I have a DX7s synth and I want to play the sound in my computer.
I have a SoundBlaster 128PCI and the connection is made with a cable in the joystick port.
I'm able to play sound with my synth, record them, playback and hear them but this is when I choose the internal synth of Cakewalk ( others instruments definition files ).
I'm not able to understand sounds of my synth ( and I have good ones !!! ), I can't hear them but I can record in Cakewalk when I play on my synth, it's just that I can't hear them !!!

I'm a beginner so excuse for my questions:
1) is there a definition file for Yamaha DX7 or DX7s ( nothing for yamaha DX7 in the Cakewalk site ) ?
2) is anybody have some hints for me ( everything is welcomed ) ?
3) I try to make a definition file with SoundLib, I saw the patch names, I'm even able to synchronize Cakewalk and my synth ( I choose a name in Cakewalk and my synth select automatically the right patch ) but no sounds !!!

Thank you for your help !!
( I search Internet and I saw that I'm not the only one with these problems ).