double logon

Sep 25, 2010 at 12:38 AM

I download and installed the SSOPortal IIS application and integrated it into a Sharepoint page using a Page Viewer webpart. I get the SSOPortal from the Live@edu page and I think its this codeplex project.

I am experiencing a double logon and even having my users loged on Sharepoint, the first time the SSOPortal is called, an explorer/windows logon page appears. 

I suspect this is something related to setup but I don't know where to look for... Sharepoint, IIS or ISA server configuration.  Any idea on where to start looking?