5th slot help

hi i download this.. and activate it in item shop and i get this in every slots if i press on them : equip item , cash item, expiring in
and i still cant buy any 5th wepones.. i still have item cannot be buy
wats am i doin wrong?
thanks

u gotta be level 16

i tryed to buy nades and i still didnt get it work..

same to me but slot 5 is useless anyways so try using diffrend hack.