USB key not visible on desktop

Hi,

I have an USB key that is mounted from OS as /Volume/NO NAME but it's not visible on the desktop and in the Finder. It worked fine until some time ago then stopped showing ion the desktop.

Finder->Preferences->General has all the 4 box for showing devices selected.

I can work on the key using the terminal, ie. I can copy files form the key to the internal HDD but I have to use the umount command or the Disk Utility to umount the filesystem.

The key is formatted as FAT32.

Other external USB storage or USB keys are correctly shown.

I tried also to "repair" the key under Disk Utility, but the problem remained.

Any suggestion on what else to check?

Many thanks

ciao

giorgio

iMac with OS X 10.7.5