Setting variables in COM called from javascript not working

var te = new ActiveXObject ("TestComplete.TestCompleteApplication.8");

var tei = te.Integration;

te.Manager.Runmode = 1;

tei.OpenProjectSuite("C:\\Tests\\AJProjectSuite\\AJProjectSuite.pjs");

tei.RunProjectTestItem ("AJ", "Tests_v_1_5");

var teproj = tei.GetObjectByName("Project");

var AJtst = teproj.Variables;

AJtst.VariableByName("GlobalUserName") = "AjUser";

AJtst.VariableByName("GlobalPassword") = "AjPassword";

while (tei.IsRunning())

{

 WScript.Sleep(100);

}

te.Quit();