help with heavy trooper

i need help figuring why my heavy trooper weapon such as PZF_3 don't do damage and was wondering if i was missing a file or something?

If you have got the weapon by hack i'ts not going to work. All weapons are server side. (well exept a few) but if not i really don't no.

And if not by hack, try re-install warrock.. If wont work contack at wr..:O