Open files (PDF) located on a different server within a network?

I have a client that would like a button that will open a PDF document.

The PDF is located on another server volume than where the Flash projector file (EXE) will reside.

This is the code I would normally use for access a PDF that is located within the same folder structure of the EXE.

btnEquip.addEventListener(MouseEvent.CLICK, openPDF);

function openPDF(event:MouseEvent):void {

var url:String = "project\units\Training\Interactive\data\datasheet.pdf";

var request:URLRequest = new URLRequest(url);

navigateToURL(request);

}

I thought that Flash was limited to accessing files only within it's folder structure or from a web server.

Is it possible to access a file on another server volume?

The path the client is providing starts with \\

I assumed that a drive letter would need to be included.