Pokemon Pearl

Hey everyone back from a good long needed brake, I am now getting back into the roms! Anyways i need help. I now have no$gba 2.6a ;D and i started playing pokemon diamond and pearl just yesterday, i closed the emulator and came back later, now everytime i try and get to the start menu it comes up with this:
A communication error has occured.If you were in the union room you will be returned there. In all other cases, you will be returned to wherever you last saved. press a button to continue. I press A and...nothing just white screen.Help please? this always happends when i try and play it.
Someone said the roms were corrupted or something but i got both my pokemon peal and diamond from here :O
P.S. sorry for another pokemon thread but i cant get this to work. everything else works perfectly even the gameplay is almost like a real ds (ALMOST:P not as great though)

Go to the No$GBA files, go to the folder "BATTERY", and delete the .sav files that are associated with them. Then restart the games from the beginning. That's something off the top of my head. I don't have another solution.Shadow

Are you certain you're using the correct save-type?