login without port 50000

hi

i implemented iisproxy on my portal to work without enter user & password.

when i login to the portal without port 50000

i can see the homepage and everything looks alright.

after a few "clicks" (display folder in km or navigate to other tab) the browser waits a little and send

me back to the portal homepage again.

if i add in address bar the 50000 ,

everything is ok and i can work without being send to homepage.

can someone help me solve that problem?

thanks

Roni.