2 logon screens when logging on to Portal

Dear Experts,

When I log on to our SAP Portal (EP 7.01) i get prompted for username and password (the "standard" SAP Portal logon window) when i press "connect" i get a second windows looking pop up window where i have to type in the username and password once again.

How do I get the system to accept the logon with only the first portal logon? (i believe the second logon screen is related to the backend somehow).

Any help will be greatly appreciated!

Thanks!

Kind regards,

Soren