1999 honda oddssey steering mount volume control does not worl with aftermaket mp3

Hi Guys,

I just install the aftermarket mp3 player in my 99 honda odyssey. i used wiring harness and connnected all the wire properly, system is working fine,
all fm / am and mp3 player working...

Only thing not working now is: My Steering wheel mounted volume control...

i cannot do anything with that, no volume up/ down nothing

any info what can be done ??? this is my 5th installation in diff diff cars and first with Odyssey ...


any help in this direction is really appriciated....

thanks guys