Xm radio activation?

i have an xm radio and it is activated, i think. But on my radio i can only get 2 channels the preview of xm and the weather.. and sometimes it says that activation is required. I have an account on the xm website and have my radio on there… so what do i have to do to actually activate this thing or how do i get more channels?

btw i have the xm everything plan >_>