Visual Boy Advance In Game Saves Whenever I Try To Save "pokemon Fire Red,dragonballz Boo Fury" It Won"t Save In Visual Boy Advance Emulator.?

Whenever i try to save "pokemon fire red,dragonballz boo fury" it won"t save in visual boy advance emulator.? - visual boy advance in game saves

indicates an error in creating such a thing, the file (null)
I have tried many games that will open and you can start to save more for my again.is ???// play emulator error, please tell me if I do download games gameboy site.all me how to save or fix the error. tell