Improper Format ? (?)

hi had a problem, a guy named ATX ^ whose id is http://steamcommunity.com/id/caioreis/
stole my item, he offered me a gift of dota 2 is not exchangeable for my courier mistic moroks like I needed that key to a friend, since the gift was not tradable, I sent the item by trade, and a second later him receive the item he blocked me instead of sending the gift as combined screen have to prove it and you guys can also see how the log and sent oque really talked. But it's all in Portuguese. link image I took from our conversation http://imageshack.us/photo/my-images/401/ladraoz.jpg/
MY historic