Could you give us more info? What module did you try to install? Can you give us a url so we can see what you mean?
Are you logged into your site when you get this or browsing as anonymous? You have to set the block permissions to get some things to show. Go to system admin and blocks and set some of them to yes and see what you get...
Chad
Edit - You posted the solution in between the time I started typing. Glad you got it!