Creative ZEN Style 300 is not being recognised

I'm having have an issue using the Creative ZEN Style 300, it shows up as being a mass storage device... however in any music management application (e.g. banshee) it won't let me put music onto it (it's not even picking it up at all).

I've tried adding in an mpi file to /usr/share/media-player-info/creative_zen-style-300.mpi but with no joy. I'm guessing this needs to be fixed through some other means.

The mpi I created has the following:
[Device]
Product=Zen Style 300
Vendor=Creative
AccessProtocol=storage
DeviceMatch=usb:041e:2016;

[Media]
InputFormats=audio/x-wav
OutputFormats=audio/mpeg;audio/x-ms-wma;audio/audible;audio/x-wav

[storage]
AudioFolders=Music/
FolderDepth=2

I believe this to be correct. I got the DeviceMatch id from lsusb, so I know for sure this is correct.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: media-player-info 14-1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
Architecture: amd64
Date: Sat Aug 27 18:19:48 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: media-player-info
UpgradeStatus: No upgrade log present (probably fresh install)