A good spot to check is the first few posts in this thread which form an FAQ for KVS. In the 2nd post you will see:

Which Access Method/System Is Best To Use For Airline X?:

* For LH/OS/AF/BA/QF/BD/IB/SK/LO/AY:
Amadeus: AUA/*A

* For AA/US/AS:
Sabre: ITN/AXP

* For UA:
Apollo: ITN/CWT

* For NW/DL:
Worldspan: ITN/CWT

* For all other airlines:
Apollo: ITN/CWT, Amadeus: AUA/*A, or Sabre: ITN/AXP

Maybe that will help you?