Vista Parental Control Throwing Socket Exception?

I received a strange bug report the other day and was hoping that someone could help me figure out the culprit. I have a plugin that uses the Facebook API to make calls from a client program on the desktop. User reports that when Vista Parental Controls is enabled, he gets a runtime exception.

A detailed bug report is available here and I have verified that Vista Parental Controls is indeed the problem. Even if no site is blocked, and even if http://api.facebook.com

allowed, I still get the exception.

Below is the violation method. Specifically, the string string result = reader.ReadToEnd();

is where the exception is thrown.

    private static XmlDocument ExecuteQuery(SortedDictionary<string, string> parameters,
        string secretKey)
    {
        string query = GetQueryFromParameters(parameters, secretKey);
        HttpWebResponse response = null;

        try
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(FACEBOOK_REST_URL);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";

            // Write the POST parameters to Facebook.
            StreamWriter writer = new StreamWriter(request.GetRequestStream());
            writer.Write(query);
            writer.Close();

            // Get a response.
            response = request.GetResponse() as HttpWebResponse;
        }
        catch (WebException we)
        {
            // Getting the response must have thrown an HTTP error. We can still try to get the 
            // response from the caught exception though.
            response = we.Response as HttpWebResponse;
        }

        if (response != null)
        {
            // Read the response.
            StreamReader reader = new StreamReader(response.GetResponseStream());
            string result = reader.ReadToEnd();
            reader.Close();
            response.Close();

            XmlDocument responseXml = new XmlDocument();
            responseXml.LoadXml(result);
            return responseXml;
        }
        else
        {
            throw new FacebookException(Resources.FacebookResponseError);
        }
    }

      

        
        
        
      

    

Obviously I have to catch the IOException and not let it become an exception at runtime. Even so, the problem still persists. I spent some time on a google issue but didn't say anything about parental controls.

Any suggestions? Thank!