Cannot change from default printer in Acrobat X by code

Question

pp.printerName = "\\\\print server\\printer"; works flawlessly in Acrobat 9 Standard but will not change from default printer in Acrobat X Standard unless run in the console. I've checked the printer names through the console and they are listed correctly. Javascript enable menu items is checked. I've even tried creating trusted functions (which still work flawlessly in Acrobat 9, but not in Acrobat X). All other printer settings in Acrobat X change as coded once the printer is changed manually.
Any suggestions?

Answer 1

function printFullPEng() {
var pp = this.getPrintParams();
var pSize = this.getPageBox("Crop");
if (pSize[1] > "792") {pp.printerName = "\\\\print-server\\HP Designjet 4000 HPGL2/RTL (Copy 1)";}
else {pp.printerName = "\\\\print-server\\TOSHIBA 4520C PCL6 - Engineering";};
pp.NumCopies = 1;
pp.pageHandling = pp.constants.handling.none;
fv = pp.constants.flagValues;
pp.flags = (fv.setPageSize);
this.print(pp);
This is tied to a menu button. As I say, it works flawlessly in Acrobat 9, but will not change printers in Acrobat X.