I think for someone who is banned you're doing pretty good. Most banned members seem to have a difficult time posting. Therefore you are ahead of the game.
Are you psychic by any chance or are you about to do something you might get banned for?? Once your banned you can't post anything...
Maybe the OP means why can't he post in some sections. Read this and use your brain (or articulate yourself better, if this is not the problem).
I think it's cruel and unusual punishment that you are getting slowly banned in stages. Why didn't they just ban you outright if that's what the've got planned? I mean you must be totally stressed out not knowing when the mods are going to lower the boom!