Hasta La Motion!

Am using Nuke 6.1 with pluing Ocula 2.1. I am trying to get the roto to be generated from my right footage to the left footage. Following error is found

1) First of all, when we right-click on the Bezier and select "Correlate" the "Use Ocula?" check out is dim, i.e., couldnt able to ‘check it’ this option
2) When correlate option is executed, it just executes for that particular frame. Meaning, the roto is generated and shifted using the Disparity vectors only for that particular frame. But for the next consecutive frames the roto continues to animate but it snaps back to the original values. Does it mean that for every frame we need to execute Correlate separately again and again.

-Prashanth