Nds emulator!

hay all.
i was wondering if any 1 can throw me a link for a Nds emulator(Nintendo ds)
iv got 1 but wen ever i load the game(which the site says its compatible with) it just comes up saying
the data could not be readplease turn of power and re insert ds catrageso can any1 help please i really wonna try out the new Pokemon diamond?

please read our [rules] regarding the use of proper English on this forum. You can find a link to No$GBA 6.7a by searching this forum, that is the best NDS emulator at this time.

oh yea sweat thanks.
sorry about the bad grammar i cant spell very good haha my bad.
ill check it out now thanks

It's 2.6a.

my mistake then, couldn't remember