MyGBA Emulator not showing files in a particular folder.

[AC guest person]

I just got a new Android tablet today. One of the first few apps I for it is a GBA/GBC emulator. Works well so far, except it can't see any of the ROMs I have in a subfolder located in a main folder where the emulator *can* see the other ROMs I loaded on to my microSD card. Who can help me here? Useful tips are much appreciated.