EWQL Symphonic Choirs as VSTi in Sonar 8.5, Some Parts Playing Wrong Notes

I'm a new EWQL Symphonic Choirs user trying to get things working properly using it as a VSTi within Sonar Producer 8.5.

I've set up four synth tracks, S-A-T-B,  each with its own instance of Play and its own audio dedicated audio track. I set up a staff view to display each of the four MIDI tracks, S-A as treble staffs, T-B as bass staffs. So far as I know I have done everything properly. But when I enter notes on each staff in Staff View, only the soprano track correctly plays the pitch of the note written on the staff.

Globally set to have middle C be C4, Soprano shows A4, plays A4. Alto shows F#4, plays A3. Tenor shows A4, plays C5. Bass shows D3, plays E3.

I have double-checked that the proper WB DYN MOD voices have been set up in each instance of play. I've checked the routing. I've double-checked that no inadvertant transposition has been entered, the staffs display everything properly.

I'm at a loss as to why this is happening, and I'd be really grateful if someone here at the Cakewalk forum who perhaps uses EWQL SC knows how to steer me to solve the problem.

I have similar posts up at the EWQL forum and the NorthernSounds forum.