Right, I'm at my wits end with this one.

I have a creative zen stone mp3 player that is not being recognised in My Computer and therefore I can't access it.

It has previously worked but I use a lot of USB devices so I think it's a Drive letter conflict problem.
The device is showing in computer management under Device manager>Disk drives. BUT I cannot access Disk Management and so cannot change it's drive letter. At the bottom of the window is the message 'Connecting to Logical Disk Manager servivce' and then 'Still Connecting' but nothing happens after this. If I unplug the device, disk manager works fine again.

One other strange occurance in My Computer is that although I cannot see the device, when i unplug it, it shows as 'Removable Disk F' for a spit second before dissapearing again.
I have tried:

Changing other device drive letters
Uninstalling the drivers and reinstalling

Resetting the Mp3 player

Any help please?!

Thanks in advance