I have a Casio Privia PX-120 and want to connect it to my Toshiba Sattelite L775D laptop so I can play the PX-120 through the computer speakers and record myself on a webcam to post to youtube. I bought an auxiliary cable to connect the keyboard to the computer, but the computer doesn't seem to recognize the keyboard. I don't want to use Midi as I want to record myself playing. The keyboard works, and I can hear through the earphone port of the computer. Toshiba told me to contact Casio as the computer's sound seems to be fine, and it's just not recognizing the keyboard. Any advice?