TTT pointshop guns not working when buy

Hello there, im having trouble with my server pointshop. its TTT and when people try to buy a weapon on the pointshop. it does not work it just takes there money and does not give them the weapon. is there a code i have to add to my pointshop script to make all guns work?

Check to make sure the user isn’t already holding a weapon in the appropriate slot

^This or make it strip the current weapon class when bought.