Forms Service generated pdf null data

I'm using the Visual Studio project from the livecycle blog (http://blogs.adobe.com/livecycle/2008/01/invoke_livecycle_with_visual_b.html) to merge the sample purchase order (PO.pdf) with xml data.

lcFormsResult.outputContent.remoteURL comes back with a valid url, which I can open in IE to view the pdf. However, I would like to get the binary data and display that instead, but lcFormsResult.outputContent.binaryData is coming back as Nothing, likewise with blobRenderPDFForm.binaryData. Any idea why this might be or how I can get the binary data?