Cougar 200k Keyboard problem

[giodegracia]

so i installed yosemite 10.10.1, everything went well with all my hardware except for my keyboard which has a problem with Ctrl, Shift, Alt, and Windows key. none of them all seem to work except for ctrl which functions as the shift key (weird). this does not seem to be a modifier key problem as i have already tried to swap everything and still shift, alt, windows key doesnt seem to have any input. i tried loading up the virtual keyboard and i got no response on the on screen keyboard when pressing shift, windows key, and alt..help anyone as i dont want to swap my keyboard.

 

[Ihtiandr]

Oh! hello my friend! i have the same problem, i thought tha i am the only one, i have another usb keyboard that works perfectly fine, and ерш one doesent work for me too.
The keys lights up, and i get no response from the keys...
If you got the solution i would love to check it out!