Thing happened while trading with outtamana

Hello Zaj, This is ambition. about 9:43 pst Nov.11.2015, Outtamana and I agreed to trade his event wedding cake, and my baium ring [a]. At first, we tried to trade items via /trade, however, either he or I was almost full inventory and did not let us trade. So, I gave him my ring via drop. Then he tried to give me the wedding cake via drop, and wedding cake was not unable to pick up and it just shows like this screen shot. Is there any possible way to get back my ring or wedding cake? Thank you for the great server.