OK, thanks for clearing that up. I apologize for misinterpreting (as near as I can tell) your original post. That's not much of a welcome.
I'm sure our friendly neighborhood moderator will take note, and ignore my message.
Now as to the problem at hand. IIRC, I'm registered to post snippets, and have a couple of times, but I can't recall exactly how it happened. If I were you and really wanted posting rights, I'd head over to the "Feedback" forum here in these boards and make mention of the problem to the staff.
A lot of the "main site" (that is, not the forum) is pretty old code, and changes in the underlying machinery, or even PHP versions or "hacks" made to keep things running, may now be working against you....