ExternalInterface call from flash to function in OOP javascript

I can't call a javascript function from flash, when the flash object is added within an OOP structure in javascript. In short the code:

In flash:

if (ExternalInterface.available) {  
    ExternalInterface.call("flashMessages", "ready");
}
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Code in javascript:

function fbTeaserClass(){

    function loadVideoObject(){
         ...
         swfobject.embedSWF(sitebase+'/FocusVideo.swf', 'myContent'+uniqueid, '100%', '100%', '9.0.0', 'expressInstall.swf', flashvars, params, attributes, outputStatus);
     }

    this.flashMessages=function(message){
        alert('called');
    }

}

Flash gets loaded, but the call to the javascript function isn't received. Anyone any ideas what's wrong?

Most likely a scope issue, your function is inside an object, try calling "fbTeaserClass.flashMessage", you may need to initialise the flash at another level also.