meccha taiko no tatsujin download won't open on ds?

I downloaded Meccha Taiko no Tatsujin from https://www.romulation.org/NDS/2250_-_Meccha_Taiko_no_Tatsujin_DS_-_7-tsu_no_Shima_no_Daibouken_(J)(PROPER)(iND).rar.html but when I try to open the file on my ds, I get a screen that says "Could not read save data.
Turn off power and re-insert card. " no matter how many times I try to open it. Is anyone else having this problem?

Yes, so many in fact that we put the solution in the Common Issues - MUST READ thread. If you don't understand the instructions in there then say so and I'll elaborate on them. :)