[contrastestudio]

Thank you very much Chris, all you mention is ok, i kinda find a solution, is working fine so far, here is what i did:

In the AMS (with the TASCAM selected for input and output audio device) in the "speakers configuration" section, instead of selecting "analog output 1" for the left and "analog output 2" for the right, i select outputs 3 y 4, and of course, plug the monitor on to it, and it miraculously i got sound, (i wander if the hardware have some damage), but is working now.

Thanks again, your comments were very helpful, since i found the "speaker configuration" walking through your original check list, also hope this helps somebody else.