Help me to solve my problem

To login to your yahoo messanger, carefulluy login your yahoo user name and password to your yahoo messanger.

also if is not working go to mail.yahoo.com and login to confarm your account is still valid.

try it and get back to me.

try to login using yahoo messanger, if was login click envelope picture and it will direct you to your yahoo mail

You might have to reinstal the latest version of yahoo messanger this might solve the problem of yours.

Reinstall the latest version of yahoo messanger.

Dear sir,

I have yahoo messanger 10. whenever if login the YM i can not make voice and video calls

Open This Link to Download Yahoo Messenger -
http://www.freedownloadsplace.com/15908/Yahoo-Messenger/version/7.0.0.249-Beta

Click on Download Now

There are some causes: Firstly; this error occurs when your connection preferences are not properly set. I'm not talking about your Yahoo! ID and Password here, but you may need to adjust certain features depending on what network you're on. Let's says for example, if a firewall protects your network, it may block yahoo messenger when it tries to connect to the server. You need to change your connection settings, click the Messenger menu in yahoo messenger and select Connection Preferences. Select Firewall With No Proxies. Select your Internet Connection type from the pull-down menu at the bottom and enter your Home Country if the adoptions aren?t grayed out. Click OK and login again using the new settings. If this option doesn?t work, click Connection Preferences in Yahoo! Messenger again and select No Network Detection. Try to login again using the new settings. In some instances, you may need to provide yahoo messenger with the IP address of your firewall or proxy server (you can get this information from your network administrator or from your Internet service provider). Click Messenger and select Connection Preferences again. Select Use Proxies. Enable either the HTTP Proxy or the SOCKS Proxy as needed and provide the proper address. Click OK and login again using the new settings.Secondly; if you are using IM9 there are sign in problems. This is what yahoo has to say. Try an updated version of Yahoo! Messenger 9.0(9.0.0.2128). This latest build includes a fix for the sign-in issues that have been affecting some users. If you were seeing an error code?81003005? when trying to sign in, this latest version may fix that problem. Even if you were experiencing a different kind of sign-in issue, I recommend installing this latest version. Hope it was helpful!

It may have 2 problems:-

Check it out

Firstly, this erroroccurs when your connection preferences are not properly set. I'm nottalking about your Yahoo! ID and Password here,but you may need toadjust certain features depending on what network you're on. Let's saysfor example, if a firewall protects your network,it may block yahoomessenger when it tries to connect to the server.You need to changeyour connection settings, click the Messenger menu in yahoo messengerand select Connection Preferences. Select Firewall With No Proxies.Select your Internet Connection type from the pull-down menu at thebottom and enter your Home Country if the adoptions aren’t grayed out.Click OK and login again using the new settings.If this option doesn’twork, click Connection Preferences in Yahoo! Messenger again and selectNo Network Detection. Try to login again using the new settings. In someinstances, you may need to provide yahoo messenger with the IP addressof your firewall or proxy server (you can get this information from yournetwork administrator or from your Internet service provider). ClickMessenger and select Connection Preferences again. Select Use Proxies.Enable either the HTTP Proxy or the SOCKS Proxy as needed and providethe proper address.Click OK and login again using the new settings.

Secondly,if you are using IM9 there are sign in problems. This is what yahoo hasto say.Try an updated version of Yahoo! Messenger 9.0(9.0.0.2128). Thislatest build includes a fix for the sign-in issues that have beenaffecting some users. If you were seeing an error code“81003005” whentrying to sign in, this latest version may fix that problem. Even if youwere experiencing a different kind of sign-in issue, I recommendinstalling this latest version.

Hope it can be helpful!
If you satisfied with this information, please do support me...
Thank You!

clean your cookies. https://help.yahoo.com/kb/SLN27197.html

download the latest version