no$gba 2.6 (wont work)

hey,i cant seem to get this emulator no$gba 2.6 to work every time i try to load a ROM (Pokemon pearl or diamond)
the emulator opens but then it just displays on the screen-the data could not be read.please turn off power, remove and reinsert the DS game cardnow i have no idea what I'm meant to do and it is the first time Ive tried to use the no$gba emulator 2.6
r there anything that i need to change with in the emulator itself??
help please!!

Take a look in the Common Issues thread.
https://www.romulation.org/forum/index.php?topic=1462.0You will want to use No$GBA 2.6a and the No$Zoomer addon.

OK I've downloaded the add on and tried loading the ROM in that but it still wont work
all files r in the same folder i just cant figure it out.is there something that I'm missing??

You need no$gba 2.6a which has the Auto save-type. The error message should not display then. The files for NO$ZOOMER need to go in the same directory as your no$gba.