identity.loginName object not working with other users

I have the following code at the folder level:
 
// Folder level script to create an application level variables for the "identity" objects properties
var Identity = new Array();
Identity.Corporation = identity.corporation;
Identity.Email = identity.email;
Identity.LoginName = identity.loginName;
Identity.Name = identity.name;
 
trustedIdentity = app.trustedFunction( function (sProperty) {
var iProperty = "";
app.beginPriv(); // explicitly raise privilege
iProperty = Identity[sProperty];
app.endPriv();
return iProperty;
})
 
I have 2 text fields, thats running the following mouse up event script:
 
if (event.target.value !== "Off"){
this.getField("SampleText4").value = Identity.LoginName;
this.getField("SampleText4").readonly=true;
} else {
f.value = "Click here...";
}
var rButton = event.value("Reset6");
if (rButton == "ON"){
this.getField("SampleText4").readonly=false
};
 
The other text field is named "SampleText12" in the code. My userID shows up on SampleText4 field, and then I'll save the file. I ask another user to open the file, (he has the .js [plug-in] file in his Javascripts folder already), when he tries to click on SampleText12 field, nothing happens. But when I open that same file, my userID will appear in SampleText12 field.