There have been problems with the back-end that supports the Partner Management Console and the Hosted Endpoint pages for most of this week.
Before you waste time performing the steps in the article Brian referred to, call Support!
Symantec performed hardware maintenance last night to correct the connectivity problem, but you may still be experiencing some of the after-effects.
Have Support take a look at your site from the back-end to see if it can be corrected there.