sync pc to mac. MB to pro tools

[JAB]

Hi folks,
I'm trying to use both PC and iMac each with a DAW running in sync. With MB as slave (MTC), when it sees MTC from the other machine, it just bumps out of MTC and goes to INT. I can see the MTC in the Transport Masters section of preferences and it all looks good. MB just does not seem to want to chase.

any sync gurus out there?

I am going to play around with LTC and see if that might be a better solution.

Thanks in advance,
jab