Bojanmk

Hi all, I got a little problem. Before 2 days I played the keyboard, I got Terratec Midi Master USB keyboard, so I played on FL Studio 7.0 . Yesterday when I started the program it doesn't want to play it. I tryed to restart the program and to change the USB port of the midi but it's still keeping not to play. I opened the MIDI options, there in the Input device is not the MIDI. Its blank. I tryed to reinstall the drivers but its not working again . Help me please. Thank you.