3.90m33 glitch?bug? isos are missing..

Hello everybody..

I had 3.52 m33 firmware.. my isos were working fine..
After i updated my psp into 3.90 alll of my isos are missing- i cant see them on my psp (under game) i can, however see them on the computer(the iso folder is in there along with all the isos)

can someone please help me?