live.step bug

I started a new deviced based on the api stepper as found here : http://cycling74.com/wiki/index.php?title=Programming_in_Max_for_Live_Episode_8:_Creating_a_Live_API-based_Step_Sequencer but I can’t draw bars in live.step object. Is that a bug or am I wrong somewhere ?

mbp dec 2012 non retina 2 x 2.4 ghz 4 Go ram osx 10.8.4 max 6.1.3 Live 9.05

Edit : reloaded a.zip attachment. Created a new live.step object and did a paste/replace and now it works. Can someone try the first attempt I attached and tell me if it works, that way I will know if this has something to do with me or if it was a bug…