Why does a script work on FF and Chrome but not on IE

[pganti]

There's this weird problem where the following script would work nicely on FF and Chrome but does not work on any version of IE. I tried to debug but no avail and hence seeking your help on this.

Succesful runs:

FF: http://www.webpagetest.org/result/150301_1Z_866/
Chrome: http://www.webpagetest.org/result/150301_70_2CC/

Failed Runs:
IE 11: http://www.webpagetest.org/result/150301_4F_2J6/
IE 9 : http://www.webpagetest.org/result/150301_E3_86C/
IE 8: http://www.webpagetest.org/result/150302_AW_C14/[/quote]

Here's my script

Quote:combineSteps
navigate http://www.insight.com/
setValue id=searchText "hp laserjet pro"
clickAndWait id=searchBtn
clickAndWait id=CE749AR#BGJ_^^HP LaserJet Pro P1606DN - printer - monochrome - laser - remarketed
execAndWait submitPPPSubmission('main', 'CE749AR#BGJ',false);
execAndWait location.href = '/insightweb/viewCart’;
setValue id=j_username keynoteuser1
setValue id=j_password password1
execAndWait InsightNavigation.validateLoginSmallWindow();
execAndWait callShipBillPayPage('shippingOrder’);

What gives on IE?