Pidgin: Not Connecting

Hi Everyone,

Great app bar one small issue it will not connect to windows messanger on my own pc
works on everyone elses pc as soon as i plug the usb drive in to my pc it says
"Our protocol is not supported by the server"
when trying to connect is very strange tried all the virus software firewall ideas as normal
could i have some sort of net frame work or something missing on my pc ???

any ideas would be great

The Master Gee