Dinkleberg's GMod

I have been trying to trade on TTT but everytime I try to trade someone, it wont let me trade. I get the "some items are not rendering on your screen" on the top left hand corner, I cant right in chat, I cant look through my items, I can however click the cancel trade and the accept check box, but when me and the other person are ready to trade, it wont let me trade. I asked tons of Mods and nobodys know, what am I suppose to do? :s

Probs best to sell then to trade / Trading for me in TTT never works when I trade with other players. At first I thought U needed the Rank Member up to be able to trade but you dont. 

But thats just me every player is different / Sometimes it works sometimes it doesnt.