XMLHttpRequest works in preview but not in install

I work with Dreamweaver CS5 and preview the HTTP/Javascript Adobe Air application as I create the code.

The application is now in a state that I figured I'd compile the application, install it, and test it.  One problem, one call, which authenticates me to an API fails.

I was hoping that someone could point out the error in my ways.  I'm thinking it's a security thing but can't figure it out.

The code I use is as follows:

----------------------------------------------

var url = "http://open-api.domain.com/authentication.getUserToken.domain";
var vars = "v=3&appKey="+appKey+"&email="+email+"&password="+password;  

var domainCOM = new XMLHttpRequest();
domainCOM.open("POST", url, true);
domainCOM.setRequestHeader ("Content-type", "application/x-www-form-urlencoded");
domainCOM.setRequestHeader ("Content-length", vars.length);
domainCOM.setRequestHeader ("Connection", "close");

domainCOM.onreadystatechange = function() {     
    if (domainCOM.readyState == done) {
        if (domainCOM.status == ok) {
            if (domainCOM.responseText) {
            //do some stuff
            }
            else {
                window.alert('unknown error in authenticationGetUserToken.');
            }
        }
        else {               
            window.alert('Password / Userid combination is not valid.  Please correct and try again.');
        }     
    }
};
domainCOM.send(vars);
return;

It works perfectly and hits the //do some stuff code every single time in preview mode.  It always hits the 'password /userid' combination error when I'm running the application.

Any help would be apreciated.