My plugin keeps opening the same image each time

Hi,

I'm currently developing my own CKFinder plugin and for some reason when I go to the image browsing window, right click an image and then select my plugin from the list (where it then sends the selected image to a new iframe window) it will load the image just fine, however if I then close the window and try to open another separate image (by right clicking it and selecting my plugin action) it will continue to load the first image I opened into the window.

Has anyone experienced this before?

My code is as follows:

CKFinder.addPlugin( 'myplugin', function( api ) {

CKFinder.dialog.add( 'cropresize', function( api ) {

    var file = api.getSelectedFile();

    var fileUrl = file.getUrl();
    var fileName = file.name;
    var folderName = file.folder;

    /**
    * This only alerts the first time i load the plugin window which is odd?
    */
    alert( api.getSelectedFile().name );

    var dialogDefinition =
    {
        title : "Crop " + file.name,
        minWidth : 800,
        minHeight : 500,

        ... more dialog definition ...

    },
    contents : [
    {
        id : 'tab1',
        label : '',
        title : 'Crop ' + fileName,
        expand : true,
        elements : [
        {
            type : 'html',
            html: '<iframe id="crop_iframe" width="100%" style="height:100%" height="100%" src="plugins/myplugin/dialog.php?fileUrl=' + fileUrl + '&fileName=' + fileName + '&folderName=' + folderName + '"></iframe>'
        }]
    }],
        buttons : [ CKFinder.dialog.okButton, CKFinder.dialog.cancelButton ]
    };

    return dialogDefinition;
});

api.addFileContextMenuOption( { label : 'Crop Image', command : "cropcommand" } , function( api, file )
{

    if ( !file.isImage() ) {
       api.openMsgDialog("Image cropping", "This feature is only available for editing images.");
       return;
    }

    api.openDialog('cropresize');


});

});