I don't think we can ever be sure we will have Mr. Layton's votes unless he is in on the motion itself. And to this point he's indicated no willingness to do that.
All indications I've had to this point is that Mr. Layton still will not support a motion to bring down the government,
Should the government refuse to debate this motion or refuse to abide by the motion ... I will move a motion of non-confidence in the government the following week.