Re: Baselign grid and Dcument Grid is not on

This script is for Grid preference. Please see the bolded lines in script. They are true in script. But, after we run the script, we have to check(ON) the show  document grid and show Baseline grid in indesign. baselineShown = true and documentGridShown =true do not make result. only If the options are are already shown in document, the grids are appearing. Please explain what is wrong in script.

var myDocument = app.activeDocument;

//Set the document measurement units to points.

myDocument.viewPreferences.horizontalMeasurementUnits = MeasurementUnits.points;

myDocument.viewPreferences.verticalMeasurementUnits = MeasurementUnits.points;

//Set up grid preferences.

with(myDocument.gridPreferences){

    baselineGridRelativeOption=BaselineGridRelativeOption.TOP_OF_MARGIN_OF_BASELINE_GRID_RELA TIVE_OPTION

baselineStart = 14;

baselineDivision = 14;

baselineShown = true;

horizontalGridlineDivision = 14;

horizontalGridSubdivision = 5;

verticalGridlineDivision = 14;

verticalGridSubdivision = 5

documentGridShown =true;

}