Elektron Musical Instruments

I can't get Cubase SX to slave to my MD.  I can get other hardware to 
slave to the MD no problem.  Only Cubase SX will not slave to my MD.  
It's driving me insane because I'm sure I've checked every last setting in 
Cubase and nothing works!

This should be easy right?  HELP!

Here's what I did:
1. Opened "Sync Setup..." in Cubase
2. Set Cubase to slave to MIDI Timecode
3. Set Cubase to listen to the MIDI interface connected to MD
4. Clicked the SYNC button on the transport

And now it should work right?  Doesn't.  It just says "Idle" all the time.  
I'm sure it's something wrong with Cubase.