Move layer group script

Found this script to do what I want but cannot get it to work with Photoshop CC 2014 on OSX 10.9.4.

// tell extendscript toolkit which adobe application to target;
#target photoshop
// determine the document on which to work;
var myDoc = app.activeDocument;
// define which open document to get the layergroup from;
// one could also open a document from a specific position on the harddrive.
var theLayerSetDoc = app.documents.getByName(“Watermark1600.psd”);
// switch photoshop’s focus to the group-document to be able to work with it;
app.activeDocument = theLayerSetDoc;
// define the group, actually one could avoid the variable and just process it directly;
var theSet = theLayerSetDoc.layerSets.getByName(“Watermark”);
// do the duplication;
theSet.duplicate(myDoc,ElementPlacement.PLACEATBEGINNING);

Keep getting

Error 8: Syntax error.

Line: 7

->  var theLayerSetDoc = app.documents.getByName(“Watermark1600.psd”);

Document name matches perfectly.

Had this working under PS CC version before 2014, but remembered I had to make a very subtle change to get a script originally for CS to work for CC? Cannot remember what it was!

Help much appreciated, thanks in advance.