Well i have been having problems with downloading and setting it up on my windows vista laptop. I also tried doing the same on my Desktop PC running windows 7, and came across the same problem.
A quick call to Motec Usa, and looks like the the VCS is only compatible with 32bit OS. He said they are working on the drivers to make it compatiable with new 64bit Os like Vista and windows 7.
just a FYI to everyone.