Just purchased a JV-1010. Love it (my first professional piece of gear). I went back to the store to buy the cable. They sold me one made by Yamaha telling me it would work. It hasnt. I installed the driver, but I noticed in Windows 98 controll panel that and there is no mention of serial ports in my machiene although I certainly have them. 
Another question. When the cable is connected can the module still recieve midi data from the regular midi in jack. It doesnt seem to. 
Any advice for a this or any other advice for a starting musician (in the classical/new age genre) would be greatly appreciated. 
Thanks in advance,
Dan