[Platinum] Can't sidechain anything, not VST nor VST3.

Let me just start by saying I've been using Sonar since 7. I made the jump from 8.5 all the way to Platinum somewhat recently and one of the big selling points for me was VST3 and the related support for sidechaining Waves plugs that comes along with that. Anyhoo...
 
I'm working with a project in Platinum and I need to be able to compress a track based on a sidechain input. I add C1 SC onto the track to be compressed, set the output of my key track to... wait, C1 doesn't show up in the list of available compressor inputs. Try a different one, C6 SC. Ok, that one shows up, but my key track doesn't actually trigger anything in the compressor when I input it into the sidechain. So, knowing the drill, I load the Sonalksis sidechain comp into it just needing to get this done... doesn't show up in the list of available compressor inputs. I can go back to 8.5 and sidechain into the Sonalksis comp all day long. 
 
I messed around with VST settings in Platinum to no avail. Migrate to VST 3 and not. Made sure my plugin layout has the VST3 Waves plugs. Disabled the migrate features and reimported the Sonalksis SC comp from the VST folder, no dice. My key track is solo'd as is the track to be compressed, where any variety of sidechain comp can be inserted, and if I'm lucky, one or two will show up in the list to assign the output of the key track, while not actually doing anything. 
 
Am I the only one having this issue? 
I looked around and found a few threads relative to this, but their issue was basically not knowing how to sidechain or having issues that were relevant for earlier releases of Sonar. Am I missing an update or something? 
 
Any help is appreciated. It will take a very long time for me to manually reduce the snare volume of the overheads I need to process. Thanks in advance for any direction.

Did you do a reset and rescan of plug-ins recently? I realize I say this to the point where it may seem silly, but so many unusual plug-in problems get solved when you do this. Not saying this is a sure thing, but it can't hurt, and may help. I do sidechaining all the time in Platinum so I know it's possible.

Automatic and manual scan is not the same as a VST reset. Here are the instructions for a reset http://www.cakewalk.com/Support/Knowledge-Base/2007013315/SONAR-X3-Full-VST-Rescan-Recommended-for-Upgraders
 
Do the bundled plug-ins with sidechain capability work?

WeekendAstronauts
 I was drunk when I upgraded. :/

Please provide steps to reproduce. I'm very keen to validate this.

Doktor Avalanche

WeekendAstronauts
 I was drunk when I upgraded. :/

Please provide steps to reproduce. I'm very keen to validate this.

As a Sysadmin at a software company, I lol'd. 

I just wanted to make sure sidechain was working for you. The Sonitus Compressor and Gate bundle with SONAR also side chain. So do Fabfilter and other third party plug-ins I have experience with. I do not have any Waves plug-ins or Sonalksis compressors so cannot help with those particular plug-ins.

The VST3 Pro-C sidechain works fine for me. The Pro-C VST2 sc version also shows a sidechain in SONAR but I have not bothered with it.
 
 
 

Adq
Do you have 8.5 32-bit and Platinum 64-bit? It could explain the difference.
It is unlikely the reason, but have you checked that "Max used inputs" is set to 4 in Plug-In Properties?

Both are x64.
Checked in the plug in properties, Max used inputs was set to 2 on the C1, so I put it to 4, however I still do not see it as an option to sidechain into. One weird note, though, I see in the options C1 Gate, but I'm not even using that in the project. I deleted the C1 comp to see if maybe it was just referencing the wrong thing, but it stays in there. Something's f*cky.

..never mind, just reread the OP's post.