Interactive script does not work in the document

I use Adobe LiveCycle Designer in SAP. On the tab Master Page placed 2 objects: Button and Image. I want to when I clicked on the Image, it became hidden. For the Button I wrote the code for Click event (language FormCalc, client):

data.#pageSet[0].Page1[0].Image1.presence = "invisible".

On the Preview PDF tab the code works (the Image disappears). But if I run my program inside SAP (Adobe Interactive Forms) the code does not work, the Image does not become invisible. Why?