Welcome to the wild and wooly world of Microsoft!
The good news is that the communications issue has nothing to do with Rhapsody or your Sansa.
The bad news is that it’s time to do a wee bit of sleuthing with your Windows installation.
The MTP drivers are an integral part of Windows Media Player. WiMP10 or 11 is required for the MTP protocol. Part of this is the Janus DRM or WMDRM-10, which handles the Rhapsody DRM automatically. The cool thing about using Rhapsody and WiMP11 is that unlike many MSC fans have discovered, integration of album art is quite seamless.
Rhapsody’s latest build will allow you to drag and drop to either the internal memory, or to the µSD card with ease; the Rhapsody Channels are the only thing that is limited to the internal memory.
If you haven’t done so, the simplest initial action to take is to update your XP installation to WiMP11, downloading the update from Microsoft. Next, download the MTP Porting Kit also from Microsoft.
Then, simply reboot your PC.
Set the Fuze USB mode to Auto Detect, and plug that baby in!
Once it is communicating, open a Windows Explorer window (My Computer) and look for the Sansa Fuze. Has it shown up under Other Devices, without a drive letter assigned? If so, you’re in business at this point, and you can now open the Rhapsody client.
The Fuze will show up in caps and smalls, not E: SANSA FUZE, in the Sources pane, if it’s happily in MTP mode.
At this point, right click on the Fuze logo, select Authorize, and load that puppy!
Let me know if it’s talking in MTP. You can try forcing an MTP connection by manually selecting MTP too. As a last footnote, you can uninstall the device in Device Manager and then unplug / plug in the Fuze to see if it will reinstall the driver.