Lighted Star Tree Topper Why Doesn't My Tech Tree Increase During The Rebel Campaign In The PC Game Star Wars, Empire At War?

Why doesn't my tech tree increase during the Rebel campaign in the PC game Star Wars, Empire at War? - lighted star tree topper

I am on the third mission, the flight of the X-wing, ready to attack Fresia, and for some reason, the tree of technology has not grown, where they build an officer of the Academy of Light Vehicle Factory and Nebulon B frigates, as in guide the player's display. I have all the available buildings (barracks, which controls the mine) in my entire planet and Level-2-rail space stations, all of my planet. Examine the tree high-tech in the Help menu, and all the signs suggest it should be possible, more on what I am now based. Can not also, C-3P0 and R2-D2 steal Imperial technology on the planet, I tried. Please could someone tell what is happening here, or how to fix it? Thank you.