Oh really :( That's a bit disappointing. I also seem to have had problems getting the MLRS or Paladin to fire by themselves. I can get them to point their tubes in the right direction, but I have to jump into the platform and manually fire.
I'm feeling a bit confused atm, I've bought DCS FC 3 and Combined Arms, and it seems like it has a slightly unpolished feel to it (as beautiful as it looks, like the devs put it on the market before they'd fully fleshed it all out (for example, the presence of the pilot in some aircraft cockpits but not others).
In other ways, the aircraft sometimes seem to behave strangely in a way I don't encounter in, say, SF2. There are inconsistent outputs from the avionics system in the aircraft, navigation, and so on.
Anyway, it does look absolutely gorgeous on highest graphics settings and I've had some fun, but it also feels like it needs some work