Agentry Add Transaction error

Hello experts;

I tried to add an transaction "myobject" it gave me an error "application error" when i push apply button. However when I add a transaction for player object it can be added. The only difference this 2 transactions player object collection fill from database player table then i can add new transaction. myobject have not any table just a collection which created by me and i got error. what is the problem ?

If I create a collection how can add an "add transection" and how can create a new object.