Webmail, Ichat, Mail Connection Issue

[skuddfot]

I am having trouble connecting to various webmail sites and to accounts using iChat an Mail. For example, I can access the main page of hotmail.com, but when I enter my email and password I just get a timeout error. I have a PoweBook G4 with Tiger connected wirelessly through a LAN.

(using Safari, but had the same problem using other browsers including Firefox, Opera, and IE)

Any suggestions?