KWA MP9 problem

[dreamweavers]

Having a problem with a KWA MP9 and was wandering if anyone could help.

Basically when i put the mag in and pull the trigger it half arsed spits a BB out but the bolt doesn't cycle (It moves ever so slightly) and then it locks in place (shut) almost as if the trigger is stuck behind the bolt or something? It is actually jammed in place and it needs to be rather violently cycled over and over before the bolt will finally open and reset the trigger.

The bolt will cycle freely all day when it's....charged? and ready to fire however when the trigger is pulled is when the problem arises and it just locks up.

Any suggestions would be awesome cheers!