Admin rights to Report Manager disappeared...?

Hi,
Out of the blue I have lost administration rights to RS Report Manager. I
can no longer access several reports (others do work). When I connect to the
Report Manager the GUI is displayed, but I can't access all of the usual tabs
(ie. under the properties tab I can only see the 'General' and 'Security'
options, nothing else.)
I've tried accessing Report Manager via a client with domain admin rights
and via the RS server with local admin rights still the same problem...
Can anybody get me started on troubleshooting?
Kind Regards,
Casey.Casey,
I had this same problem...everything worked fine and then out of the
blue I couldn't update reports, deploy new reports, log into Report
Manager. I discovered that in Computer Management console when I Right
clicked on Default Web Site and went into Properties, then Directory
Security, then clicked on Anonymous Access and Authentication control,
and clicked the Edit button, that I did have Anonymous Access set.
When I tried to remote into that web server and perform changes I was
getting logged in as the anonymous user account with the limited rights
I gave that account. After hours when I'm working on the web server
now, I turn the anonymous option off, Restart IIS and do my
work...finally with the proper rights.
I hope this helps...
Jeff