Game doesn't work for me

I'm using NO$GBA emulator for my NDS games.
when trying to activate https://www.romulation.org/NDS/1812_-_Ben_10_Protector_of__Earth_(E)(M5)(PUPPA).rar.html
it says "data could not be read" and doesn't let me play.
what is the reason for this?Thanks ahead, Dor.

You need to go to Options, click the tab that says NDS cartridge backup media...... pick one of those until it works.

sweet!
it works :D
thanks :Dnow, another problem.
in many games I see the characters half transparent.
i.e. : Pokemon Ranger and the one I just downloaded Ben Ten.
why's that? and how can I fix it?

Its the emulator itself, NO$GBA does that with most of it's games......you need to download the Emulator IdeaS.... here the link....https://www.romulation.org/forum/index.php/topic,4710.0.html

Thank you very much :)
Very nice and helpful community :D

Not a problem... the best way to get answers is to ask questions...Happy downloading :D