Recording/audio mixdown from overbridge to cubase 8

Hi,

I have just installed the latest software to my MAC and OS to my elektron analog keys. I can use the keys as a vst but cant seem to grasp how to record my midi into an audio file. I tried doing an audio mixdown as I would any other VST but the audio that comes out the other side is some what incorrect.

any advise would be much appreciated.

cheers