anaglyph

Hi, I bought an Optima Compact Gen4 over two months ago. Since then I have been trying to connect it to a bell box from another manufacturer without success. Honeywell technical support simply say that I MUST buy their Reson8 siren! The bell box model is Mars 2000, the instructions and circuitry are attached. I have tried numerous combinations of the panel's A/D/B terminals to the bell's H-/H+/SO terminals but the bell is never triggered by the panel. I know that the bell works because I can manually trigger it by changing the voltage on H+ or H-. Any tips before I give in and buy the Reson8? Thanks...