I need help with pokemon mystery dungeon red rescue team

When I try to activate it. It says error unsupported file type, and everything on my screen enlarges. ???Can someone help me with this please.P.S. I am a noob at using emulators so it could be something simple.
I got my emulator from here http://emulator-zone.com/

https://www.romulation.org/forum/index.php/topic,1663.0.html