Web service certificate problem C#

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C#

security

service

web

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I have a problem, I using a securty certificate instaled in client station to connect the server, this client station is running a Web service and the Server is running other WebService. For considerations, the *.pfx file it's insttaled in the client,

This it's the log's message WS client when it try to connect to the Server running this metod "emitir":

1° old URL : works

2° new URL: "The request failed with HTTP status 403: URLBlocked."

3° IP public, 4° other IP public : "The remote certificate is invalid according to the validation procedure."

so, if I run SoapUi in the client station 1,2,3,4 works! with this, I suppose all firewall rule are set.

C#, FW 4.6.1

System.Net.ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
    
    Ws.ServiceService client = new Ws.ServiceService();
    
    client.Proxy = ObtenerProxy();
    
    ruta = @"E:\Apps\WsSeguros\AC-net.pfx";               
    
    client.ClientCertificates.Add(new System.Security.Cryptography.X509Certificates.X509Certificate2(ruta, "1234"));                              
    
    string response = client.emitir(xmlEmision, usr, psw);

please any idea.

Greetin

What I have tried:

I've tryed SoapUi in the client and it works