Guys, it's quite a pleasure for me to see that both of you think we're all telepats here and solve all kind of problems distantly even without any information about your model of notebook, type of OS, version of drivers and iformation on re-installing system, installing some 3rd party software and the moment the problem happend - for what have you done before it, was it on a new just-from-shop laptop or you've done something? For now it looks like "hey, how much fingers do I show now behind my back?"
Spend two minutes please on description of those things, for they are extremely helpful. Thx.
These buttons aren't lamps. Try to reinstall this and if doesn't help - try restoring system by NOVA button. If doesn't help - lead ahead to the service-centre... These buttons should work by default with Windows Media Player - so try in it to find out if they're allright.
There're only two things for me that for now can affect this situation. The first one - yoou can try update also a chipset driver, as far as inductive keys controller are connected to the motherboard and proper work of it depends on right drivers for it. The second is trying to install some application to assign your keys manually. Something like this, this or this.
If these doesn't help - it seems that some hardware doesn't work properly. So you must call service-centre of your area (usually it's number is on the box or in the guarantee sheet/manual).