F8 keyboard light not working

Hi all:

When I press the F8 button, the level indicator comes up, but there's a "not allowed" symbol as well (the circle with the diagonal line through it). This is the same when I press the F9 and F10 buttons - it comes up, but also the "not allowed" symbol.

Can someone please help me? Thank you very much!

 

I went there, and tried enabling and disabling the "illuminate in low light" and it still keeps the "not allowed" symbol. What am I doing wrong?

 

problem solved!

Thanks for all you help. I figured it out...