Instant Messaging Programs

I hope this is the correct place to be posting this.

Over the last few days, it seems my instant messaging programs aren't working anymore. When I got my computer, I used the mac version of Windows Live Messenger. I had also tried Adium, but settled on Windows.

For some reason, I can't log in anymore. I thought at first that it might just be the program that is messed up; but when I went to try to login with Adium, it was stuck in the logging in process for eternity. My internet works perfectly fine, but none of the msgr programs work.

I did a quick search of possible reasons, but most of them were being that one program worked and a different one didn't. In my case, none of them work.

Does anyone know any other decent ones I can try to see? Or might it be a permission thing with the connections? I tried logging in on my other computer and it seems perfectly fine.

Thanks for the help!

EDIT: I guess mentioning that I have the base 13" 2011 model could be helpful too!