Programming the subwoofer on a Theta Casablanca II

I am wondering if my subwoofer outs in my processor are defective. I cannot get a signal to my subwoofer irregardless of how the subwoofer settings are configured. My front side speakers are basically full range down to 32 Hz. The center only goes down to 50 Hz and the side and rear surrounds go down to 60 Hz. I have chosen the correct crossover frequencies and set the number of subwoofers to two, as mine has stereo inputs. I was using the Linkwitz-Riley crossover type. I am not sure what the slope should be set to but I do have the crossover frenquencies set as previously mentioned. I have set the internal crossover in the subwoofer to the highest frequency allowed to allow the CB II to handle the crossovers as they are superior. I have also set the subwoofer configuration to L/R subs with a full setting for sub1 and sub2. Can anyone help me understand why I am not getting anything through the subwoofer? The subwoofer works as I can use the unbalanced outputs for front L/R and get sound. But this will not be effective in surround modes, at least not the best solution. Thanks for anyone's help.