I made Midi Designer work with Sonar. In this case Sonar X2. I'm using Windows 7 64 bit.
I just use it for the basics, I rigged up control on my iPad for Play/Stop, Record, Rewind, and Undo. I can also control my faders. I need to be able to control these functions from behind a drumset, since I'm usually recording alone.
If anybody needs help with Sonar, I can most likely help you. Just ask.