Cubase 7 not syncing up with Reason 6.5

Greetings Cubase community
I am having problems with syncing my Cubase 7 with the new Reason 6.5 anyone have an ideas?

Are both set to the same sample rate and frame rate?

How are you syncing them? MTC? How are your connections set up? Which is the master, and which is the slave? Is one clocked - or referenced - to an external source? Is it hard out of sync from the beginning, or does it drift? If it drifts, how much? Project(s) with audio, or VIs?

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