Route MIDI-IN to SB16 FM Synth

Hello,

I'm trying to use a MIDI Keyboard Casio PX-310 with a Sound Blaster 16 ISA no PnP, so that when I play the keyboard, the SB16 FM Synth plays. The system is Win98SE (that means that MS-DOS 7.11 is also an alternative).

I tried with MIDI-OX to some degree of success but I'd like to know what the alternatives are. Is there something simpler that works directly in Ms-Dos?

Thank you.