Iso/cso show up corrupted apart from a few!!!

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Place Iso/cso files in correct folder
2.load game list in xmb
What is the expected output? What do you see instead?

only view 3 games instead of the 7 i put in there
What version of the product are you using? On what operating system?
6.60 ProC fix 3 on PSP1000 (phat)

Please provide any additional information below.
I have tried many custom firmwares and the same sort of thing happens, i 
reformat my stick and try copying them one by one, and when it gets to about 3 
iso files they start coming up corrupted data, i know all the iso's work as its 
not the same ones that show up all the time. for example, after a format of the 
stick, i will be able to play virtua tennis, gta vice city, and nba 2k12, 
another time those games will differ depending on what iso/cso files i copy 
first. i have plenty of memory as it's a 16gb card. please help as it is very 
frustrating :)

Original issue reported on code.google.com by [email protected] on 31 Jul 2012 at 7:56

[GoogleCodeExporter]

1. Is your MS a genuine original MS or an adapter for other cards? If it's an 
adapter it's probably not properly compatibile to acess memory above a certain 
point.
2. Check id your MS is not damaged. Try not only copying files on it but also 
reading them with your PC. Or simply use some diagnostic software.
3. Did you format your MS using a PC or your PSP? Try both leave formating with 
your PSP for the last (remember to backup your saved games and data first).

Original comment by piotrekhenry on 3 Aug 2012 at 3:47