Admin roles disappear when accessing the portal from the central instance

Hi everyone,

I have a strange situation occuring when I try to log on to our portal from the portalserver itself (the central instance). When I log on here it seems that I have noe roles assigned to my admin user. All I see is Welcome My Name, the search field below this and the three links; help, personalize and log off at the right side.

But when I log on from 'outside' all is fine and all content shows fine.

Do any of you have any idea of what this can be?

Regards, Stina