503 error in after deploying in task scheduler(production only).Its not replication from Local development server/Code

Question

Calling one api http://10.xxx.xxx.xx:xx/web/services/xxxxx with json list as a parameter, It working from local machine (c# program and postman also).

using (var client = new HttpClient())

        {

            try
            {

                var jsonpar = JsonConvert.SerializeObject(new
                {
                    param= objorders
                });

                var url = config.weburl;

                var stringContent1 = new StringContent(jsonpar , Encoding.UTF8, "application/json");


                var apiResponse1 = client.PostAsync('http://10.xxxxx/web/xxxx', stringContent1 )
                if(apiResponse1 .result.issuucesscode)

{
}

But when deploying same code to task scheduler in server, getting below response.

Error:ServiceUnavailableStatusCode: 503, Reason Phrase: 'Service Unavailable', Version: 1.1, Content: System.Net.Http.StreamContent, Headers: { Pragma: no-cache Proxy-Connection: Keep-Alive Connection: Keep-Alive Cache-Control: no-cache Content-Length: 859 Content-Type: text/html; charset=utf-8 }

Answer 1

(https://www.websense.com/content/support/library/web/v80/wcg_help/cnocache.aspx)

Maybe you should look into it.