Space chatter is gone

I'm playing the SP of Crossfire 1.9 I have a bit of an odd problem that I'm hoping someone could help me with.
I'm missing space chatter, and by that I responses you get from NPCs when you go to dock somewhere, clearance when you launch, NPC commentary in combat, NPCs communication between themselves...etc.
Now, the funny thing is, those are the only sounds that are not there; the nice A.I. lady who informs you about the status of your ship and can you dock somewhere is still there, combat sound effects are still there, music is there, mission speech is there and I even get a response when I hail another ship in space.
Even odder is that I had space chatter for the first 10 missions, but somewhere between 11th mission and the end of the original campaign they disappear (the range being so big because I had it in mission 10 and I don't really know if any of the stuff in missions 11,12 and 13 normally does space chatter).
I tried playing from mission 9 onward, but the same thing happens; I tried uninstalling FL, FLMM and Crossfire and then installing them all again, but nothing changes.