Alright so i just got my regulator back in. Now I felt like I forgot something and checking http://www.geocities.com/craigbrace/ im right, i forgot the white plastic piece that I pushed out while taking the regulatr OUT
(14. Near the top of the door, there is a small, white plastic piece sticking out that needs to be pushed in. Push both sides in while pushing back to get it inside the door. This will be a pain to get back in later, but you have to do it to take out the regulator.) .

well now i cant find that piece at ALL, i dont know where it could hnave gone but i cant find it. can anyone tell me what its function is and how important it is? I don't even remember what it looks like or what it did, but i do remember taking it out. thx.