Tick the "VIA Ports Only" box in JungleFlasher, also try and use WinAPI or PortIO (the option that isn't already selected).
Reading the JungleFlasher tutorial will help you also because once you remove the VIA drivers, JungleFlasher will give you a pop up box giving you information about when using a Hitachi drive (you will only see the drive under the DVDKey32 or MTKFlash tabs).