PS3 does not find USERDATA.JAM?

I formatted my USB drive in FAT32, which PS3 uses, and placed my PS3 cook on there, and placed that into the PS3, going into the Community/Mod Browser/Import thing, and it said that it couldn't find the mod/map on it. Anyone know what to do to remedy this situation? I'm hearing that mod/map files are easily corrupted on a USB drive/flash card when used with a PS3, but...I'm wondering if this would be the fault of newer firmware updates or what. Anyone have any ideas? The thumb drive is a PNY Attache 4GB, btw, if this is significant.

To clarify myself, in the Community/Mod Browser area of the PS3 version, when I hit Square, and select the USB Device, it comes up with the message "The import operation could not be completed. There is no data on the storage media." I mean, what the--? I could have sworn that I did everything to the letter. If there are any extra steps I should have done, enlighten me, because I did everything that I was supposed to that I can tell... Wonder if me using 64-bit Windows 7 to format and place the file on the drive had anything to do with that...perhaps Sony's picky about how the PS3 can use the files without being corrupt?

[sing-song]GENIUS!!![/sing-song] Thank you, that did something...and it played almost as nicely as the PC version of the map.