I have professional membership premier. i am logged in . I wanted to answer in the forum. but the programs says I can't. Why? Did I understand something wrong?

Yes, but I don't remember to which forum post I wanted to give an answer, I wrote and when I clicked for sumit, it said I can't because I am not a member...and then, all I had written was away.

I found it and tried again. The same problem:
The post is: emo
"favorite video tab" from "somara".
when I try to post an answer I get the error: "Access to this location not allowed without membership"