I uploaded the WPMU plugin to one of my sites: Ideal Blinds

I uploaded the WPMU plugin to one of my sites: Ideal Blinds earlier - no problem. This afternoon I tried to upload dashboard to another of my sites: internetincomeintelligence.com and in one corner of the screen I can see my Gold membership status recognised, but when I try to upload a theme, it tells me I need to upgrade to do so!

Any advice please?