SMS Error after publishing application online

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C#

VB

ASP.NET

Hey Guys,

i've some strange problem in sending sms to mobile from asp.net

i am using this function and it works great on my PC (Local)

but after i publish the application online it doesn't work.

it doesn't even give me a message to search for it

Notice: i've put try and catch and i am displaying the error message in a label but the error message returns empty.

may be this is a problem with the server but i don't know from where to start solving it

please give me any notifications about this.

this is the code:

private string SendSMS(string To_Sender, string Message_Text)
    {
        string resultMSG = string.Empty;
        try
        {
            string UserName = "myUserName";
            string Password = "myPassword";
            string SmsText = Message_Text;
            string MSISDNs = To_Sender;
            string URL = "mySMS_Provider_URL";
            SmsText = getBigEndianUnicodeText(SmsText);
            string url = string.Format("{0}?username={1}&password={2}&smstext={3}&isCompressed=1", URL, UserName, Password, SmsText);
            ////Create HTTP Request to the URL.
            HttpWebRequest request = HttpWebRequest.Create(url) as HttpWebRequest;
            // the following lines to use POST method. 
            request.Method = "POST";
            request.Headers = new WebHeaderCollection();
            request.Proxy = new WebProxy(URL, true); ;
            request.Headers.Add("SOAPAction", "\"\"");
            request.Method = "POST";
            request.ContentType = "text/xml;charset=UTF-8";
            request.CachePolicy = new
            System.Net.Cache.RequestCachePolicy(System.Net.Cache.RequestCacheLevel.NoCacheNoStore);
            request.KeepAlive = true;
            // Compress recipients using GZip algorithm.
            byte[] buffer = Compress(MSISDNs);
            //// Get the request stream.
            Stream dataStream = request.GetRequestStream();
            //// Write the data to the request stream.(Add recipients to the request body)
            dataStream.Write(buffer, 0, buffer.Length);
            dataStream.Close();
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
            ////Read Page Response.
            StreamReader reader = new StreamReader(response.GetResponseStream());
            string resultString = reader.ReadToEnd();
        }
        catch (Exception ex)
        {
            resultMSG = ex.Message + " //// " + ex.InnerException;
        }
        return resultMSG;
    }