I paid for the WPMU Dashboard and successfully added it

I paid for the WPMU Dashboard and successfully added it to my blog’s plugin. It is there but each time I try to activate a plugin. I keep getting message that I need to upgrade. I have already paid the first month $39 and set up monthly subscription of $99 using my PayPal account.

I have received payment confirmation on both emails and in my WPMU member area. Why am I unable to add any plugins or themes if I already paid. I have cleared cookies on my computer and tried different browsers but no success. Please help.

Thanks.