Callsign issues.

I recently finished setting up Janet Air flights from KLAS to Area 51 (my first attempt at AI). They work just fine, but there's a small problem. Instead of using the callsign "Janet", ATC just uses "Boeing". I've already created a Janet callsign, and it works perfectly on my flyable Janet plane, but not for the AI versions. I've checked out the aircraft.cfg, and the atc_airline field is correct.
It's not a big problem, but I'd like to fix it, as it hampers the realism a bit. Any suggestions?
It's not a big problem, but I'd like to fix it, as it hampers the realism a bit. Any suggestions?