I did, however, create a new account which signs in fine with the new version.  Seems to me that indicates no connection issues, yet my old pre-upgrade account will not sign in.  After trying , a few seconds later, gives me message that I have been signed off of messenger.  I have changed password twice and can sign into mail with same settings just fine.  WTF over?
134675
Hmmmm\nLet us try the following.\n1- Clear history and cookies\n2- Delete temporary internet files\nBoth 1 and 2 are in Internet options from Control panel\n3- Restart computer and try again\n4- Mark me as best answer if the problem goes with the wind \n5- Check for antivirus, you need one
72403
Let me try to understand. First you sign-in and then you sign out. The another person enters his login-id and tries to signin but it fails. You have close Yahoo Messenger and then restart to signin?\n\nThats very strange!! Because if you enter the password and user-id clearly it doesnt matter how many people sign-in one after another.\n\nMaybe you should uninstall YM and re-install it. It could be some installation issue...\n\n.:Fishie:.
299170
delete yahoo! messenger and reinstall it again.it's probably has some compatibility issues or bugs.It is also sometimes caused by a virus, but not if don't think so.
507729
I had this same problem from early morning 10-30-06 till late evening 11-01-06. Was unable to get answers from Yahoo! help. Finally I went to Yahoo! e-mail sign in page and reported that I forgot my ID. Found that I couldn't read my e-mail till I changed my password. By 11-01-06 around 8:00pm, at last all was well and I could get into my e-mail again. \n\nYahoo! is having big problems with all the big and crazy changes they're trying to make. Sure wish Yahoo! would learn to leave a good set up alone!!
350024
Check your connection. Messenger should have a link in the bottom that checks what's wrong. Check the proxy in your msn, if you have a firewall it might have started to block it or just block the proxy and doesn't let you connect.good luck
574432
Do you use it on more than one computer?  If so, did you remain signed on when you last used the other one?   This happens to me---work/home issue.   It's best to sign off every time you leave your computer anyway, just as a security measure.   Maybe if you reboot your computer it will clear out, if it's just a "glitch".
645956
Log out of everything, and shut down all internet windows, go to control panel, uninstall/remove programs, choose messenger. redownload and reinstall it. This is messing everything up.
290828
Why do you need your old version? You should be able to log in with the same name and password and all your friends, etc. will still be there. If it has been uninstalled and you really want it back you should do an internet search and see if you can find a site that lets you download the old version.
631865
LMFAO!!! Yahoo's claiming to be upgrading the Chat rooms & features on Groups.  I don't miss it as I rarely went into one for the same reasons.  I've stuck to chatting on Yahoo's messenger & my AIM messenger.
263331
My first guess would be someone else knows your account name and password. Whenever they log on it will bump you off. Create a new account and see if the problem goes away. If it does then my answer is correct. Yahoogirl u full o crap! It happens all the time! I have done it myself!
188923
Trillian is good.  Have you tried downloading the file for MSN Messenger again and attempting to re-install it?  I would suggest going to your control panel, then add/remove programs and see if the MSN Messenger is there.  If so, click on it and uninstall it.  Then go back and download the file again.\n\nHere's the link:\n\nhttp://join.msn.com/messenger/overview/\n\nI just thought of something else.  If you are using Windows XP, there is a Windows Messenger already built into your system.  You can use your MSN ID to log onto MSN Messenger using Windows Messenger.  Click your start button, go to ALL PROGRAMS and see if you see Windows Messenger (a little green guy icon), if so double click on him and you should be good to go.
143126
Does someone else use your computer? Maybe they uninstalled it. Try reinstalling whatever messenger you use.
394015
it's weird baby.. how can the sign in box couldn't be used... maybe the network is still not ready..try to wait for awhile...because i have experience that my msn was looked like not working but after i wait for awhile..it's working... or maybe your computer have any firewall program... sometimes the firewall program blocking the access of messenger.. better to try to close the firewall program first...\nfor the msn for windows millenium, maybe you can find the proper version from the msn website...
221048
I don't know if you can delete this but you can click on sign out of messenger and then sign back in as yourself.
634186
redo it. Un-check the pass word and then when trying to sign on to server and it asks for a pass give it and then click remember pass. Hopes this helps....
71598
Here are some suggestions you might want to check/try: \n1.  The date on your computer needs to be set properly -- double click the clock verify that \nthe time and date are set. \n2.  If your password information is not saved, verify that you are typing it in with the \ncorrect case (uppercase or lowercase). \n3.  Change your password @ http://memberservicesnet.passport.com/memberservice.srf, then try \nsigning in again. \n4.  If you use a firewall (like ZoneAlarm, Norton Internet Security etc. ), it's possible \nthat Messenger doesn't have the correct rights to access the Internet, especially since you \nupgraded.  You may need to re/add Messenger to the allowed list of programs in your firewall \nif this is the case. \n5.  If you disabled your firewall in the past, it still may be blocking Messenger -- try \nrestarting it and see if that helps the situation.  You also might try uninstalling an \ninstalled firewall, to verify that it isn't causing a problem (even if it is disabled). \n6.  Clear your IE cache and cookies -- open Internet Explorer, click the Tools menu, then \nInternet Options, then click the Delete Files button, and when that's complete click the \nDelete Cookies button. \n7.  Check your IE Security settings -- open Internet Explorer, click the Tools menu, then \nInternet Options, then Advanced tab, scroll to the Security section, and verify that "Check \nfor server certificate revocation" is unchecked.  Also verify that 'Use SSL 2.0' and Use SSL \n3.0' is checked, then click OK. \n8.  Click Start, then Run, and enter the following: \nregsvr32 softpub.dll \nthen click OK \nThen try again\n\nAny computer problem\nanswer by expert join our group \nhttp://groups.yahoo.com/group/prithvionline
110393
This might not help, but trying won't do any harm...\n\nOpen your messenger and click on preferences (or hold Ctrl+Shift+P), and select the connections option.\nIf it's set to No proxies, change it to Firewall with no proxies, then select your connection settings, press apply then try to connect again.\nIf this doesn't work then try playing around with the preferences, but remember to return it to the original settings if nothing fixes the problem.\nIf all else fails, uninstall and re-install again, and if that fails contact Yahoo messenger help (F1 in messenger).\n\nGood luck!