If your +/- volume buttons do not work with on centrafuse with a touchscreen then you chould set on your touchkit configure utility (in settings tab) the 'Mouse mode' to 'Normal mode' (it is default), 'click on touch' does not work on these +/- buttons!
In 'click on touch' mode all centrafuse buttons work except these 2 volume buttons
This took me a while to find out what this problem was...
