Hmmm...they may not have updated the member services roster yet. That takes a little time, and you've only been initiated for two months!
Most likely, they just haven't added you yet.
Call IHQ and ask about it. If they say you've been added, the only other thing that I can think of is: if you have zeros in your roll number, don't input them. The sign-in section is a little funny about zeros.
Hope this helps!