WCF does not work, WebException and AuthenticationException

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C#

WCF

certificate

Hey guys,

My WCF Service does not work. I received this message on 'ServiceModel Audit':

"Message authentication failed.
(...)
WebException:
The underlying connection was closed:
Could not establish trust relationship for the SSL/TLS secure channel. --->
AuthenticationException: The remote certificate is invalid according to the validation procedure."

**

I already use the line below in client project:

//Trust all certificates
System.Net.ServicePointManager.ServerCertificateValidationCallback = ((sender, certificate, chain, sslPolicyErrors) => true);

**
My cert is installed on root folder:

<behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehavior">
		<serviceSecurityAudit auditLogLocation="Application" serviceAuthorizationAuditLevel="SuccessOrFailure"
         messageAuthenticationAuditLevel="SuccessOrFailure" />
          <serviceMetadata httpsGetEnabled="true" httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
          <serviceCredentials>
            <serviceCertificate findValue="CertName" storeLocation="LocalMachine" storeName="Root" x509FindType="FindBySubjectName" />
            <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="ValidadeUser, MyNamespace" />
          </serviceCredentials>
        </behavior>
      </serviceBehaviors>
  </behaviors>

please people, help me!. Thanks a lot.