Links work in test, not after publishing

Preface: I'm a novice a little over his head.  Trying to teach myself on the fly, so any answers given might need a little more context or explanation than usual.  Thanks in advance.

I'm building a simple menu interface.  Buttons link to various URLs on the company intranet and well as documents and folders on the company network.  My URL links work fine, but the ones I created for network folders and files aren't working properly.  When I test the movie in Animate, they work fine, but they don't work after I publish the movie.

I used the code below to create the network links:

pg_5_btn16.addEventListener(MouseEvent.CLICK, pg5_btn_16);

function pg5_btn_16(event:MouseEvent):void

{

navigateToURL(new URLRequest("file://NETWORK LOCATION"), "_blank");

}

I suspect I'm using the wrong action for what I want to do, but I'm not sure.  I've poked around some and tried experimenting with fscommand and externalinterface, but haven't been able to use either of those methods to resolve the issue.  Any advice is appreciated.