How do I start the mission on Dathomir in Empire at War: Forces of Corruption?

If I try to move any unit on Dathomir, Zann says it's a mission for Uthar and him alone. However, when I try to move them there nothing happens (including dialog).


Beginning the mission is a three step process:

  1. Send a defiler to corrupt Dathomir (use any method of corruption you prefer).
  2. After Dathomir is corrupted, send a defiler to sabotage the orbital scanner.
  3. Move Zann and Urai as a two person fleet to Dathomir.

You need to Destroy the Orbitalscanner first....then you can move zan and urai to the planet