Hello Bob,
Will check out the mentioned thread. I too assign all the AP disconnect, trim and autothrottle commands to yoke buttons. I do that thru FSUIPC, using buttons on the yoke to send key presses. I quess per your comments that is not possible on the CS 757. On my other add-on Boeings, when the AP button is pressed it causes a "soft" Ap disengage which disconnects the servos without interacting with the AP disconnect bar.  Once again thanks for your input.

Regards,
Joe Esposito