The Fuze is not the Fuze v2. You selected Fuze as player, which can't work on the Fuze v2. Also, Rockbox Utility and Rockbox are released independently. It's up to you if you want to use an svn build of Rockbox Utility (I do it all the time, besides, a new release is coming up so svn is almost if not completely identical to what the new release will be).