Lights stops toggling on/off

Hi everyone,

i am a newbe here. I purchased a VCI 100 arcade and i have been using it for 2 days.

I believe the mapping is awesome. I do however have a big issue:

after 5/10 minutes using it, the lights on the controller stop toggling on/off.

This gives me really a hard time using it, because i can't tell anymore what's happening watching the controller.

In the case of the fader fx button for istance, the fact that it doesn't toggle anymore means that i don't know anymore whether the mode is activated or not, as there are no clues on the Traktor Gui. I only realize it by trying to move a fader and see what happens. But of course this is not the way it's meant to work.

Other buttons lights that stop working are sync, headphones, loops... and others, basically all the controller!!

i am using the 3_5 mapping on Traktor 1.2.5

i need help.....!

Thanks,

Paolo G