Does not work - CMMG, Inc Auto Sear Trip

I purchased this auto sear trip for my cmmg 22lr conversion kit so I can use this on my AR15 that has the Fostech echo trigger gen 2 and it does not chamber the round. I tried to pull the charging handle but it does not want to move at all. It seems the the lower portion of the sear that faces the magwell seems to be hitting something. I might have to go to a gunsmith to help me figure this one out. I have 3 cmmg conversion kits and all three does the same thing. I'll try to do another follow up after I take it to the gunsmith.