I receive an error message just before the image appears that will (hopefully) display the dependencies.

Here's what's logged to the event viewer:

These are the technical details about an error that occurred.

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exception name: System.Net.WebException

description: The remote server returned an error: (407) Proxy Authentication Required.

handler: user interface

------------------------------ STACK TRACE BEGINS ------------------------------

at System.Net.HttpWebRequest.CheckFinalStatus()

at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)

at System.Net.HttpWebRequest.GetResponse()

at System.Xml.XmlDownloadManager.GetNonFileStream(Uri uri, ICredentials credentials)

at System.Xml.XmlDownloadManager.GetStream(Uri uri, ICredentials credentials)

at System.Xml.XmlUrlResolver.GetEntity(Uri absoluteUri, String role, Type ofObjectToReturn)

at System.Xml.Schema.DtdParser.ParseDocTypeDecl()

at System.Xml.Schema.DtdParser.Parse()

at System.Xml.XmlTextReader.ParseDtd(XmlScanner scanner)

at System.Xml.XmlTextReader.ParseTag()

at System.Xml.XmlTextReader.ParseRoot()

at System.Xml.XmlTextReader.Read()

at System.Xml.XmlValidatingReader.ReadWithCollectTextToken()

at System.Xml.XmlValidatingReader.Read()

at System.Xml.XmlLoader.LoadCurrentNode()

at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)

at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)

at System.Xml.XmlDocument.Load(XmlReader reader)

at System.Xml.XmlDocument.Load(String filename)

at _16._1(String )

at _28._1(String )

at _26._3(Object , EventArgs )

at System.Windows.Forms.Control.OnClick(EventArgs e)

at System.Windows.Forms.Button.OnClick(EventArgs e)

at System.Windows.Forms.Button.WndProc(Message& m)

at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)

at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)

at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

------------------------------ STACK TRACE ENDS ------------------------------