Can't connect to the internet in my virtual machine

I am running Window XP on Parallels 5 on my Macbook Pro (I have OSX version 10.5.8), and can't connect the the internet in Parallels. The error report number is 1356805. I've seen a lot of questions about this, but none of the solutions that I've tried has worked. My internet provider is U-Want Internet, a british internet provider that works exclusively with UNITE student housing. It requires a username and password to access. I'm not sure if that has anything to do with it. I can connect fine on my mac. I've tried everything that I know to try, and running out of hope.