Sick Tree! 17/04/2014

This week the tree had some problem. Unfortunaetly two of his leaves had some problem and one is already dead, while the other one is yellow and will die soon. In my opinion the problem the tuna can starting to be too little for the tree and also maybe I used too much water in it.
Now i will transfer the tree in a real vase but it will be difficult to do it without damaging the roots. I really hope that this will solve the problem (if there is a real problem, becouse the rest of the tree looks great and totally healty)