thanks, I've watch the tutorial, and i got the motion down.
also, the vortex suicide tutorial helped quite a bit.
i had 2 mistakes, the first one, its the unwrapping motion, with my non dominant hand, i touched the string in order to unwrap the diabolo, which caused it hit the string in front of it, and somehow to a weird sprinkler.
the other mistake i had, is that like it says in the vortex suicide tutorial, instead of letting the diabolo reach the stick , i forced a wrap around it, and because of the momentum of the diabolo, it carried the other one into the same wrap, which caused a sprinkler.
thanks, Sean!