ERROR 407 HTTWebRequest C# WindowsForm

ERROR 407 HTTWebRequest C# WindowsForm

Hi.

My problem on CMD during but trying found solution, bur i've got New problem When i Deploy My WindowsForm on new environement.
On my computer, it's ok, but on this second no.

19-11-14 09:08:57 [ERROR]: Exception in Type: HttpWebRequest at Method: System.IO.Stream GetRequestStream(System.Net.TransportContext ByRef) in File:  at Line: 0
Exception in Type: HttpWebRequest at Method: System.IO.Stream GetRequestStream() in File:  at Line: 0
Exception in Type: ZohoHTTPConnector at Method: System.String Post() in File:  at Line: 0
Le serveur distant a retourné une erreur : (407) Authentification proxy requise.

19-11-14 09:08:57 [ERROR]: Exception in Type: ZohoHTTPConnector at Method: System.String Post() in File:  at Line: 0
Exception in Type: ZohoOAuthClient at Method: ZCRMSDK.OAuth.Contract.ZohoOAuthTokens RefreshAccessToken(System.String, System.String) in File:  at Line: 0
Exception in Type: ZohoOAuthClient at Method: System.String GetAccessToken(System.String) in File:  at Line: 0
Exception in Type: ZCRMConfigUtil at Method: System.String GetAccessToken() in File:  at Line: 0
Une exception de type 'ZCRMSDK.OAuth.Common.ZohoOAuthException' a été levée.


Do you know what is the problem.

Thank's a lot.