Yahoo messenger keeps signing me out stating I amsigned in on a different computer

Try using a different browser like Firefox, Internet Explorer, or Chrome. Are you using a different computer? If so, the website may not recognize any cookies, sometimes this will result in an error code or preventing you from signing in even with the correct id/password. Make sure you are using caps or non caps as your sign in may be case sensitive.
If you are still unable to sign in with a different brower or using the computer you normally use, you may need to change your preferences. Go to messenger and click on "connection preferences", then click on "connect directly to the internet", click "apply", click "Ok" to sign back in.

If all else fails, try uninstalling and reinstalling messenger. Go to Control Panel and click on "Programs" Find messenger and click uninstall. Then go to http://messenger.yahoo.com/ to download and reinstall.

Hey buddy, sombody probably knows your yahoo ID's password and is accessing it from another computer.

Change your Yahoo ID's password and dont share it with anybody. This should prevent you from signing on a different compute or device.

Let me know if this helps. Thanks! :)

You disconect fromchat because you signed in the yahoo messenger
Messenger is a different applicatio from chat. yahoo considers the user of the application as different, so yahoo disconects you from one application from the other

mcdevito75 here, At the Yahoo home page itself use help / contact us lower rifgt corner of page. Sorry no phone number.

Welcome to FixYa

• Check your Messenger is Sign in at the Time of Sign in to Yahoo mail
• Check in MOBILE phone/any other Device as you Signed in
• Check in any other Browser as you Signed in
• Check any other yahoo account is Signed in your Computer
• Restart your PC
• Sign out from Mobile/any other Device

Yahoo has prevented us from having 2 Instant Messaging capable programs open and active at the same time.
For example, Yahoo Messenger with Yahoo Mail or Yahoo Web messenger, your mobile phone, Ipod, or other computers etc. etc.
Yahoo classifies all these programs as "Different devices or locations". Navigating from one to the other will close one program and you may get the notification message you refer to.
OR someone has hacked into your account- Report to Yahoo and Try to Recover it-Send report Politely and concisely.Do not try to Send More report for Same cause..
If this Helped -Rate ME...Thanks for Contacting FixYa

"You have been signed out out of chat because you have signed in on another device" ?

Hi,
Since Messenger Version 9 was launched, Yahoo has prevented us from having 2 Instant Messaging capable programs open and active at the same time.
For example, Yahoo Messenger, Yahoo Webmessenger, Yahoo Mail, your mobile phone, Ipod, or other computers etc. etc.
Yahoo classifies all these programs as "Different devices or locations". Navigating from one to the other will close one program and you may get the notification message referred to above..
Note. Hitting the X on the Contacts page in Yahoo Messenger does not sign you out of Yahoo Messenger, it merely closes the contacts page. Like WLM you have to close the program by right-clicking the icon in the system tray and selecting 'Exit'
You can have Yahoo Mail and Messenger ( or any other program ) open at the same time as long as your status is "Offline" in Yahoo Mail. Use the drop-box next to your name and "Sign out of chat"
Your online contacts will vacate the inbox until you make yourself "Available" again

Probably you left your messenger in on-line mode on another computer (at work etc.) When you go on-line on your current machine it disconnects the other one and after a while it's trying to reconnect automatically.

Install older version of yahoo messenger..
And let me tell your one thing that, when to try to login to your yahoo account on yahoo messenger, your internet connection must be responding. This you can ensure by keeping your server busy(opening websites).
The problem you are telling might be caused when you are trying to login to yahoo account through yahoo messenger and yahoo mail.
I recommend you that you open yahoo account through yahoo mail(only if you are unable to sign in to yahoo account through yahoo messenger.)
yahoo mail now-a-days is providing yahoo chat service when you sign in your yahoo account on yahoo mail.
at left side of your mail box you can see yahoo mini messenger.

THANK YOU for contacting Fixya.com

A) A glitch.
B) You are signed in somewhere else.

Try it again. Also, if someone else is signed in to your account, you can boot them out by signing in yourself.

I'd change the password.

You can only have one yahoo "Instant message capable" program open at one time. So if you move from Messenger to mail or chat you will get this message. If you want to have Yahoo Mail open with another Yahoo IM program you will have to set your status to "offline" in MAIL by using the dropbox next to your name ( all new mail) select "sign out of chat"
In Classic mail its located in the Inbox. Your online chat contacts will vacate the inbox until you make yourself "Available" again.
Yahoo classifies - Messenger - Mail - webmessenger - my yahoo - mobile phones - computers etc etc as different computers or devices - hence the confusion.