M-Audio (Evolution) MK-461C Midi Keyboard just stopped worki

Hi all. I have a really big problem and i tried my best to solve it but maybe someone can help me here.
i am using 64 and 32 bit of Cubase 6 on WIN 7 64 bit. for no reason my M-Audio (Evolution) MK-461C Midi Keyboard just not playing anymore on the 32 bit . I downloaded the win 7 driver for it from M-audio site and everything. re installed the software but nothing.
I do hear the sound from the VST synth keyboard but when i try to play in the MIDI nothing. No sound and i don’t even see that the meter is moving. I went to the setting and removed and reconnected and changed the USB cable but nothing…

BUT in the 64bit version its working perfect. Also in presonus studiuo and Reason 6. the same problem.
Any ideas please…