Correct. I've always been able to use Java clients, and still can use other ones for other websites. However, I cannot use mirc because the University thinks that its used primarily to send illegal file transfers (meanwhile, they have their own P2P software which a lot of students use for the same purposes), nevermind the hypocricy.
I just bypassed the problem somehow, but when I tried to test to see if I could get it to work twice it failed. The instance where it bypassed happened when I had one open window with the disconnect, then opened another window and attempted to connect. Now it doesn't work.