Disklavier

I finally got tired of Windows and installed Ubuntu Linux on my old laptop I use to play midi files on my Yamaha Disklavier III. When I had windows, I used Van Basco's Software and added songs from the hard drive to the play list and pushed play. The midi played on the piano. I had bought a $10 midi cable like this one 

http://cgi.ebay.com/USB-MIDI-Keyboard-Interface-Converter-Cable-Adapter-/280483295330?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item414e1b7062

from Ebay and everything was working great. Now I have the same hardware (cable and computer) but different software. Can anyone point me to the right direction of how to get everything to work again please? The midi's are playing through laptop's speakers but nothing going through the cables to the Disklavier. Please help, I hate to be going back to Windows.