Invalid Operation Code: "19"

I've created a HDTV 1080p (24fps) comp in After Effects that I've rendered to H.264 Blu-Ray format.

I import the file into Encore and tested out my project - everything seems fine.

When I go to burn my Blu-Ray I'm getting this error:

Blu-Ray Object: "my blu-ray", Error: "invalid operation", Code: "19", Note: "primary video attributes must be consistent withint playlist"

Can anyone give me any tips on what causes this error or if I might be doing something incorrect...

-Foo