Kangaroo icon not working

Hi, I have just started to explore grasshopper and am using kangaroo 1 to simulate a simple origami folding. When I click the kangaroo icon, I don’t get the play symbol. May I know why?
trial.gh (30.4 KB)
trial.3dm (2.9 MB)

Hi Mithuna,

That example is for an old version - there are better versions of this here using Kangaroo2: