Problem With SSO on Websphere Portal.

[NaviGator]

Hello guys,

I have a strange issue. My environment settings are,

Cognos Server :
Win2003 Server
Cognos 8.4
WebSphere Application Server 6.1

We have another server which the Websphere portal is installed. We have managed to deploy the cognos portlets to the portal server and enable the SSO. When I tested the portal page that contains the Cognos portlets everything was working fine.

When I tested the same page from another PC, the Navigator portlet was working but the viewer portlet asked for the username and password. after a quick investigation, the only difference between the 2 machines is that I am running IE7 while the other machine is running IE6. in other words, the SSO fails with IE6 but works fine with IE7.

One of my colleagues reports the same problem with IE8. So right now, only IE7 is working fine !!!

Did we miss anything in the configuration ? what do you think ?