wcf adding issue?

I'm working with N-tier architecture. I have a WCF service in a hosting layer. I added services file successfully in here.

Problem is when I add the service in an application. It adds the service to the project successfully, but when I call the service I can't call it from my application class but when I rebuild project I haven't any issue.

On the other hand if I add the same service to another project I haven't a problem and everything is ok.

Has anyone encountered this?

 <bindings>
  <wsHttpBinding>
    <binding name="WSHttpBinding_IMyService" closeTimeout="00:01:00"
      openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
      bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
      maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text"
      textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false">
      <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
        maxBytesPerRead="4096" maxNameTableCharCount="16384" />
      <reliableSession ordered="true" inactivityTimeout="00:10:00"
        enabled="true" />
      <security mo开发者_运维百科de="Message">
        <transport clientCredentialType="Windows" proxyCredentialType="None"
          realm="" />
        <message clientCredentialType="Windows" negotiateServiceCredential="true"
          algorithmSuite="Default" />
      </security>
    </binding>
  </wsHttpBinding>
</bindings>
<client>
  <endpoint address="http://localhost:5555/MyService.svc" binding="wsHttpBinding"
    bindingConfiguration="WSHttpBinding_IMyService" contract="ServiceReference1.IMyService"
    name="WSHttpBinding_IMyService">
    <identity>
      <dns value="localhost" />
    </identity>
  </endpoint>
</client>