IOS 6 and Iprism

I recently updated to IOS 6 and now my Iphone 4S will not connect to my wireless network. We use Edgeware's IPrism for web filtering and to also prevent unauthorized users from connecting to our network. The problem that I am having is that when I try to connect, I am routed to Apple.com. Well, Iprism doesn't allow that - the device has to authenticate but instead the OS is trying to redirect to apple.com which is being blocked.

Has anyone else encountered this issue? It was never a problem with IOS 5.