DDS retrofit

[nicos]

Hello everybody.
I would like to retrofit only DDS fonction on my ipc instrument.
Retrofitting all TPMS cost a lot.
I have the correct ABS pump and my car is already equipped with ESP .
I have retrofit 6 buttons console with the DDS button.
With Opcom i activate in IPc variants configurations "Dds enable"
When ignition is on in my ipc instrument i have the dds light check on for 2 sec.It seems to be correctly activated on my ipc.But when i put on the button dds to reset system in my ipc the dds light dont flash as it must to do.
So my question is what else i have to activate so dds system works correctly?