I can't connect at yahoo massenger?what problem is that?how to change proxy/firewalled?anyone can help me?

if messenger won't connect .... click messenger / preferences / connection / set it to %26quot; no network detectedI can't connect at yahoo massenger?what problem is that?how to change proxy/firewalled?anyone can help me?Go Messenger menu %26amp; click %26quot;Connection Preferences%26quot;. Then select %26quot;no proxies%26quot;. You can change the firewall settings by going to Start--Control Paner--Windows Firewall. Click %26quot;Exceptions%26quot;--Add Program and select yahoo messenger