so if..

if i want to hear my keyboard on mpc the only way is to load a program? but then how i can hear the sound that the keyboard produce is there a way?

To use a synthesiser keyboard with your MPC you will need to connect a pair of MIDI cables, programs are for samples loaded into the MPC.

To monitor the output of your synth and MPC together you will need either a multichannel audio interface, a multichannel mixer or both.

Peep this thread: viewtopic.php?f=18&t=104585