Raysor Blade

To the good people @ Cakewalk Bandlab. Received this message: Unable to open audio playback device. Device may not support current project's audio format or may be in use. Earlier in the day when I used the software it was working perfectly fine. In edit preferences my audio devices inputs and outputs are checked, I'm using M-Audio M Track Eight. And a message under midi devices showed up before I can open my project, saying: Your midi devices need to be routed when I checked edit preferences my MidiSport 2x2 Anniversary was checked as well. Not receiving audio. In control panels on my computer M-Audio is active/ready. Really need to get my audio back-up for me, I have important music to finish. Need assistance to what the problem is? Hoping I don't have to uninstall my drivers M-Track Eight and MidiSport then reinstall them. Thank you for your knowledge.... Keith