Full auto is *not working* glock problem..

[Glock_Perfection]

Okay i still have this problem. I have already replaced parts 250 and 253 thinking it was the problem but unfortunatly that wasnt the problem. I dont know whats wrong with it. It wont shoot on auto and now semi is starting to not shoot. When ever I change the selector to either mode and release the slide lock, it sends the selector towards neutral, even in auto and semi. If in semi and release the slide lock the selector switch goes down a little, if in auto up a little. Idk whats its problem..