DL3-GrandMA-S video- Output settings

First time using the DL3 and am attempting to set the internal camera to output via s-video out to a switcher, then onto a Barco O lite wall. Following the DL3 manual, I have the control channel on the Motion layer set to DMX 229, dimmer is open but the switcher is not seeing signal. Forgot to mention, we have a S-video to SDI converter in line. The LD has a reason (thought I can't remember what) for not using SDI out of the DL3 directly to the switcher. If there's a good argument for this, let me know.

Any ideas as to why I'm not seeing image at the switcher, or signal (for that matter) at the converter?

Mucho Mahalos.