Windows7 multitouch support

hi all,
i’ve just buyed a DELL sx2210T, and the multitouch (2 touchs really) goes very well. The problem is that when i try to detect the 2 pair of coordinates from the touch input (with mouse global for example) i see only the first.
So, i searched on internet and i found a post in the nuigroup forum for converting touch inputs from win7 to tuoi standard, but my hardware seems to be not supported at all.
do you have any suggest? it is possible to make a bridge between windows 7 touch inputs and vvvv?
thx all