Problem with Hi-Capa's Hammer

I had the upgraded hammer spring in my Marui Hi-Capa and it stops working. The hammer will cock back and the trigger will release it without the slide on, but when I put the slide back onto the lower frame, the hammer stays back and nothing works. The disconnectors appear to be stuck. The hammer remains stuck untill I remove the entire grip.

Any CHing can advise me what problem I'm now facing with?

Thanks alot.