You can only edit your posts for 15 minutes after you initially post. After that time you need to ask a mod or admin to do it for you (just send one of us a PM). Or you could post a follow-up with the extra info or whatever. The time limit is to prevent people changing their posts some time later after it has replies, which could confuse the meaning of the thread or make the replies seem odd. It would be better if we could prevent edits after there are replies but vBulletin doesn't have that option.
