This sounds very similar to some configurations on the Cisco Wireless LANS.
Take a look t the following case and the comments made by f235124 (James) to see if this helps get you running with your CSS.
I have to admit that I spotted the post by James about an hour ago. I have forwarded the information to my colleague who looks after the Cat Tools installation. I've not seen it myself to be honest, so I don't know how different 3.4 and 3.6 are. I'm hoping there's not much difference.
I will post back how we get on. Thanks again.