CDRWin 4.0ABeta

Hi. I use CloneCD and Nero no probs. When I try to use CDRWin 4.0A Beta with my liteon 16x10x40 CDRW it tells me there are no supported devices installed so I can't use it to burn anything. I have used it in the past (weeks ago) but now I can't. According to the web site all Liteon's are supported. Any suggestions??