[FIXED] Beretta M71, jammed slide

So originally this was planned as review of this gun, but then this happens:

In process of re-assembly slide stucked in rear position and move just about few milimetrs forwards and backwards, cant make it operational or disassembly again for no obvious reasson. Some tips how to fix this?
So far i lubed every spot where is frame in contact of slide or its parts, some minor violence was used, but that didnt work

EDIT: now is slide stucked in almost right position, little bit back, but want move in any direction

Thanks mate! Its fixed now, dont know how i manage to screw it that way, but once u showed me what to do, it was easy fix