createTOC error

Hi all!!

I am working with InDesign server CS3. In my script I'm having problems calling to the function createTOC().

This is my code:

var estiloTOC = app.documents.firstItem().tocStyles.itemByName("EstiloTOC1");

app.documents.firstItem().createTOC(estiloTOC);

The error only says javascript error in the function createTOC.

I try de same code in the InDesign CS3 desktop version and it works.