I am using a Korg NX5R sound module and Cakewalk Home Studio 9. I was using the Korg with a Windows 98 machine and it worked great. I began having the same "freezing" problem when I got a new computer with Windows XP as the operating system. Every time I turned on the Korg, the computer would lock up. If the Korg was powered up before booting up the computer, the boot process would freeze until I turned the Korg off. The problem was the interconnect cable from the "PC to host" connecter to the COM1 connector on the computer. The cable must be wired exactly like the cable in the Korg user's manual. In my case, the jumper between pin 7 and 8 on the COM1 end was not there. I had to build a new cable and the problem was solved.