Opening composition(CS6) in Mocha, the New Project window showing Frame range 0 to 0.

[MaxAx]

I am editing a 59.94 fps clip in After Effects and when I go to Track in Mocha AE, the New Project window is showing frame range 0 to 0 and cannot be changed(See screen shot).  So when project loads in Mocha, there is only one frame shown.  The composition plays fine in AE.  I open a different composition and Track in Mocha AE and range is correct and plays. 

[Rick Gerard]

Unfortunately, that cropped screenshot tells us absolutely nothing about your timeline or your project. The most likely problem: User Error.

We need a lot more workflow details and to see a screenshot of the timeline with the modified properties of the layer you are trying to track in Mocha revealed. Press UU and give us something to go on. 

[Mylenium]

Chances are the timecode and stream ordering in the the MP4 file are messy. It may need to be transcoded/ conformed.

Mylenium