xpa5 and 4311ci trigger problem.

[xpa5avr4311ci]

hello,
 I've connected trigger output of 4311ci to trigger input of xpa-5, but the amp doesn't turn on/off when the pre-amp is turned on/off, It used to work before, I had removed the cables for cleanup and when connected again, I'm having this problem. Any ideas  what is going on and how to fix it. 

Thank you 

[adaboy]

Double check the Denon to see if the trigger function is still on and set correctly. I've seen them change once every blue moon.