I have found that there may have been an issue with the Fuze v2 with the Sansa Updater. If the Updater does not recognize it properly, uninstall the Sansa Updater, then download, and install a new copy of the latest Sansa Updater here.
Download and then install the latest updater. It should be available at this link. Version 1.0.2.3 is the latest (internal designation).
With your Sansa plugged in, follow the on screen directions to download the Sansa Media Converter.
Details are in the second link, including installation steps.
microsansa