Heh heh, I can't help ya fix it, but I can offer a way around it.
You know the command, setmimic ? Well, perhaps you could use it, for example:
In my map, UrbanSunday (Deals with the January 30th, 1972 Tradegy in Ireland) once you arrive on the Airport in Nogova, you board a bus, along with two other people. Once your on the bus, they start to chat, and you learn their lovely personalities...Heh heh....
While I have the text changing at the bottom of the screen to say who's saying what, I applied "Facial Expressions" while they're sitting to tie down to what their saying.
Using the "setmimic" command, you can make them show facial expressions, even while their on a bus, plane, chopper, or other-wise.
Like I said before, I can't help you fix your problem, but I can offer a solution around it. The Command Reference Description of "Setmimic" is provided below for your convienence:
unitName SetMimic "mimicType"
unitName is the name of the unit to modify.
mimicType is the type of facial expression. Valid values are :
"angry" - Angry look
"smile" - Happy look
"suprise" - Suprised look
"hurt" - Hurt look
"sad" - Sad look
"ironic" - Ironic look
"cynic" - Cynical look
"agresive" - Aggresive look (NOTE: The spelling is correct )
"normal" - Normal look
I hope I helped, and good luck!
-RunAwayScientist