Help Samsung Fascinate won't connect to android market through Wifi?


I just got a Samsung Fascinate from Verizon and I can connect to the android market fine with the 3G, but once I turn on wifi it says that there is a network issue and it wont let me connect?

This is through my schools network and I have to put in my login details before I get connection, but even after I do that it still won't connect. Anyone know why?