‘change footer text’ -"rebranding WPMU" siteadmin section dissappears

I installed the plugin named, "rebranding WPMU". I was using its "change footer text’ tool to see how that changes the admin area. however, when i entered some text and saved the options, it seemed to change some of my admin permissions so that I do not see site -admin section in the left part of my admin area (below the dashboard) at all. When I paste the url to the options page into a internet browser it gives me a message similar to "You do not have permission to access this page".

I am using WPMU 2.8.2 and since those who use 2.8.1 do not seem to have faced this issue, may be it shows up with my version only?

Would appreciate any help