Help me please....

[Lady Dee]

I'm trying to install Yahoo! messenger, that i had no problem with and once it was done, but when i went to sign in on the messenger, it wouldn't let me.
My account works fine, i can check my inbox and everything! Change settings, shit like that; but for some reason the messenger wouldn't let me sign in, so i uninstalled it and going to try to instal it again, if it doesn't work the second time around! I think i'm going to be having some serious difficulties, any suggestions?

[Morty]

When you say it won't "let you login" what do you mean? What's the error message or whatever that is displayed?

[Lady Dee]

It says "we were unable to sign you into yahoo messenger."(can not Connect)

At the very bottom of the window that pops up it says, LAN/Firewall Users: Setup proxy-Button...If you know the proxy settings, you can configure them here.

Help-button...Need more help? get it here

That's all it says, nothing about errors or anything like that...?