Google Analytics Event Tracking "labels" not recorded

I'm using Google Analytics event tracking with the new asynchronous code. I have specified a set a categories and actions, and they show up just fine in my analytics profile. However, I know that I have pushed elements to the gaq array which includes labels as well, but they never show up in my analytics profile, even though I wait 24/48/72 hours. My code looks like this, is placed in a seperate file (GA.js) and is referenced from default.aspx (only page in the site, all subsequent page requests are through AJAX):

function GoogleAnalyticsTrackEvent(Category, Action, Label) {
    //alert(Category + "|" + Action + "|" + Label);
    if (Label) {
        _gaq.push(['_trackEvent', Category, Action, Label]);
    }
    else {
        _gaq.push(['_trackEvent', Category, Action]);
    }
} 

function GoogleAnalyticsTrackPage() {
    //alert('track page');
    _gaq.push(['_trackPageview']);
}

/* Code below is executed when default.aspx is loaded, and only then */
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-20332645-1']);
GoogleAnalyticsTrackPage();
GoogleAnalyticsTrackEvent(MobileRequestType_MobileWeb, "Accessed Login Area");

(function () {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.开发者_运维知识库async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();

Anyone have any idea what I'm doing wrong?

EDIT:

Here's a different call that includes the label parameter:

GoogleAnalyticsTrackEvent(CurrentMobileRequestType, '" + pAction + "','Exception Message Displayed');"

From the code you're showing, you never actually pass a label parameter to the GoogleAnalyticsTrackEvent() function. So, the if(Label) conditional returns false, and the else block executes, and sends a tracking event without the Label. In order to have a label, you'll need to pass a third parameter in that function.