Event

Hi I watched John's (DGDMacos) YouTube video about events that updates the text boxes value of a selection change.

http://youtu.be/MuMCmX8vWVw

I tried it in X4 and it worked fine. However, it does not trigger in X3 and X5. I have reinstalled X3 and X5. I updated both with service packs. Any ideas why it is not triggering in the two versions?