HELP!!!! Latency issues with Quad Capture & Amplitube - SOLVED

I'm an idiot...all I had to do was push the PDC button in the Mix Module...nothing to see here...nothing to see here...
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Hey friends...I have a very easy to describe problem, but even after reading COUNTLESS threads re: latency fixes, still have no solution.
 
Here's what I got:  When I play my guitar "live" into X1 when the audio engine is running but the song is NOT playing, I hear NO latency and a perfect signal coming from Amplitube.  The moment I hit play, the latency between what I am playing and when I hear it it NOTICEABLE.  I am using ASIO drivers, and have a roundtrip time of 7.5 milliseconds.  When I look at Preferences, X1 has checked "Use ASIO Reported Latency" of 329.  Yes...I've checked, unchecked boxes, entered random numbers, changed drivers, ran wave profiler, etc. and no change.  I'm pretty good at this stuff usually, but this one has me stumped.
 
I have Amplitube inserted as a stereo bus to avoid the "Sonar treating it as a mono track" like I used to run into before, when I had it in a track's EFX bin.
 
What am I doing wrong???  Thanks in advance.
Rizzo