Thanks You so much for support ! Are some thinks I dont understand (too ...) ...
1. I dont use MPASM in code.
2. My astonishment it's about non-function of this hardware ! If I connect JUST the resistor on jack, the HU react ! If I use same resistor -via optocoupler - the HU react ! But with PIC, dont !
I increased the time for each tris command, but without results !
Code:
case 1     ; volume down    
 trisb.2=0
Pause 5000 ; I try even with this huge pause !
trisb.2=1
...
endcase