g-force not working on my ds

I am new to this and need some help for something that may be easy. when I load the unzipped file to my ds it looks great but when i try to play it it freezes - blank screen. what can i do?

Take a look in the Common Issues thread.
https://www.romulation.org/forum/index.php?topic=1462.0What flashcart are you using.

i don't even know what a flashcart is. very new. i tried reading the common issues - like trying to read greek.

What device or cartridge are you using (such as an R4) ?