Maybe try getting into the move a different way? That way you get a feel of the move, the knee on the pole really needs to be hooked properly.

Heres a couple of vids of different ways to get into this one;

From straight edge http://i68.photobucket.com/albums/i20/loopylolacherrycola/th_Suzescombo.jpg

From marksman http://i68.photobucket.com/albums/i20/loopylolacherrycola/th_MVI_1269.jpg

From shoulder mount http://www.youtube.com/watch?v=pNHr38pmZOc

You can also get into it from a basic invert or a cross knee release. Or if you are ok at handstands you could try and get the leg hook from a handstand on the floor to the side of the pole

Be careful, in particular getting out of brass monkey, I’ve nearly nose planted before now