I don't know that app but ill assume its in firmware 1.5 format if your having issues.
Do you have a fat or slim PSP?
If its fat, do you have the 1.50 kernel plugin installed?
If you have a fat but dont have that installed, get it from Here and put your homebrew in X:\PSP\GAME150
If you have a slim PSP and its firmware 1.50 based homebrew, getting it to run will be more complicated...
Bookmarks