I have a X5 4.4i with a MK 3 NAV computer. I am trying to upgrade the firmware due strange issues with the NAV unit. Addresses programmed into the unit will not save when you turn off the key. Also, the master volume always sets to +10. I have a V32 disk but it does not do anything once I insert the disk. I have left it in the unit overnight and no upgrade, it just sits at the screen. Any ideas?