I think the mention that there was limited experience with FiTech on here is spot on. I have no knowledge about their products really, so couldn't be of any help to you directly. And gather many others are in the same boat.
Have you tried contacting the company directly? It looks like this is their website:
Other than continuing to tinker as you are, and probably searching elsewhere online for suggestions, that is probably going to be your best help. Feel free to post back when you get things working better as it could help others down the line.
What do you think of the system otherwise? They seem to have a lot of options on their site and I couldn't see an easy way to narrow down choices to what might be needed for a FSJ. Why did you go with the Street 400 over any of their other options?