ISO Files read as currupted

I have checked other forum posts with this same issue but none of the solutions have worked for me.
My PSP is loaded with cfw 6.6
The memory card has been tested and works on Eboot PSX, TempGBA, and SNES9x.
I loaded my ISO files into PSP\ISO with no subfolders.
Either the ISO file or the ISO folder creates one currupted data icon in the mem stick section for 'game' on the psp.
I tested 3 different working ISO files in PPSSPP but when i put them on the psp they are currupted.

 

I Solved this issue by putting the ISO inside the root file BEFORE the PSP file.