Cannot locate ISO file - No Items?

I want to play an .iso file using PCSX core, but the XMB menu will not show the file, even though the folder I am pointing to contains it. I can view img and bin. If I’m not mistaken, I do not think the iso needs any special conversion, it should be ready to go.

Nevermind, I found an answer here: http://libretro.com/forums/showthread.php?t=3506