Reply to S4 FX buttons issues

Hi all,

Since few days, I got a problem on my S4 :
FX button 2 on deck A and FX button 1 on deck B does not work when I pressed it.

I need to go on options/traktor S4 controler and RESTORE parameters.

After that, buttons works as well, but i need to do it every 10-15 minutes ...

Does anyone got this problem ever ?

I don't know if it's a hardware or software problem.

PS : My system is totaly clean and I just re-install TP2

Thx in advance