What post are you trying to make? Try posting it here and if it wont let you then I would PM a member of admin and asking whats wrong with the post (politely). Check out the rules for a list of admin to send it to.
EDIT just realised you can't PM. In which case if you can't post it here go through it with a fine toothcomb to see whats wrong with it.
What is a fine toothcomb anyway?!