New Post: export

how do I make the export work, either for the store or an application. I have the following code:
StringBuilder sb = new StringBuilder();

        XmlWriter xWrt = XmlWriter.Create(sb);
        storeContext.myAzManStoreRef.Export(xWrt, true, true, true, null);
        azManAppContext.azManApp.Export(xWrt, true, true, true, null);

And the result set in the stringbuilder is always empty even though I have Items defined in an netsqlazman application.
Is it because I have the owner object set to null. I can't find any documentation on what it should be set to or what it means. Any help will be appreciated.