go through your weapon tags in gurilla and reset the trigger to primary instead of secondary. ^_^ Although if its not a single ammo-based weapon i think you may have done what some people often do and forgot that there are two seperate sections to set primary and secondary fire. Check that you used both.

I'm pretty sure he meant the node "primary trigger", and not the actual button itself.

under the primary trigger in the weapon tag, check the box "projectiles use weapon origin"