Grab image and display on plane

How do I grab image from my documents path and display on plane on IOS? This code results in a ? on the plane. My path works perfect with a web view within the app and it is also successfully saving the screen capture in the photo library(camera roll). I'm using Prime31 Plugin. Thx for any help!!!!!!

function ScreenCapture(){
    EtceteraBinding.takeScreenShot("image1.png");
    EtceteraBinding.saveImageToPhotoAlbum(GetDocumentsPath()+"image1.png");

}
function GetDocumentsPath() : String{
    var DocumentsPath : String;
    DocumentsPath = Application.dataPath.Substring (0, Application.dataPath.Length - 5); 
    DocumentsPath = DocumentsPath.Substring(0,DocumentsPath.LastIndexOf("/"));
    return DocumentsPath + "/Documents/";
}

function Start () {
    ScreenCapture();
        var go = new GameObject.CreatePrimitive(PrimitiveType.Plane);
        var url = (GetDocumentsPath()+"image1.png");
    go.renderer.material.mainTexture = new Texture2D(50, 50, TextureFormat.RGB24, false);
    while(true) {
        // Start a download of the given URL
        var www = new WWW(url); 

        // wait until the download is done
        yield www; 

        // assign the downloaded image to the main texture of the object
        www.LoadImageIntoTexture(go.renderer.material.mainTexture); 
    }
}

Prepend the url with file://