Shoutbox

maybe will this help:

First, check the .NET service status as this error may be caused by problems at the MSN servers.

If there are no reported problems on the MSN servers, see if your proxy settings are correct: click "Tools" and then "options" at your MSN Messenger main window. In the options screen click "Connection" in the list to the left. Next, click the "Advanced Settings..." button. If you do not use a proxy server, these textboxes should be empty.
If you are on a network the network administrator can probably tell you if you should have proxy settings in Messenger.

Make sure if Internet Explorer supports 128 bits encryption. Open Internet Explorer and click Help, then About Internet Explorer. If the Cipher Strength is less then 128 bits download and install the Internet Explorer High Encryption Pack. MSN Messenger needs encryption to authenticate (check your username / password)

In Internet Explorer: click Tools, then Internet Options, click Lan Settings in the connection Tab, click the "automatically detect settings" button, then click ok twice to confirm. This will let Internet Explorer and MSN Messenger find out the best way to connect to the Internet via the current network.