DarkRP i cannot drop my guns for some reason?

So i have a darkrp server and recently i have noticed that i cannot drop guns for some reason? If i try to drop any m9k gun with /drop nothing happenes, it doesnt even say the command in the chat, and when i try to do /drop with a restricted weapon it shows that its working because it says unable to drop weapon.

Does anyone know how i can fix this problem? I have been dealing with it for quite some time now and cannot figure out how to fix it :/