Vegas 11 closed captions for HD broadcast

My goal was to import an scc file, embed into 30 min infomercial, and print to DVCPro HD tape. Considering it was my first adventure into this workflow situation I thought it went very smoothly.

The captions appeared as blue markers above the video on the timeline. I slid the markers group to achieve perfect sync, selected the entire clip, and printed to DVCPro HD using BlackMagic Decklink extreme HD, HD-SDI to a Panasonic AJ-HD1200 deck. Wasn't sure how to double check this tape for captions after recording was completed, but audio and video was there so I sent the tape in to the station for broadcast.

Guess what? No closed captions.

I CMA with a rendered .mov file of the same program and the station will use that instead of the tape. I'm sure the .mov file has closed captions because I imported it back into Vegas 11 and the captions showed up as markers within the video clip.

The station specs call for vanc 9 captions and that's about all I had to go on.

So........... Where did I go wrong with the DVCPro HD tape? Is this a vertical blanking issue?