WCF 4.0 REST Service configuration problems

Question

I'm facing problems trying to expose a simple WCF 4.0 service as a restful. It's SOAP part works fine. My operation contract is marked with [WebGet(UriTemplate="example/{param}")]
and my web.config contains the folowing

<services>
  <service name="Service1">
    <endpoint address="data" binding="webHttpBinding" behaviorConfiguration="web" contract="IService1"></endpoint>
  </service>
</services>
<endpointBehaviors>
    <behavior name="web">
      <webHttp/>
    </behavior>
</endpointBehaviors>

Actually the code was taken from here.But I'm always getting 404 error. What I'm doing wrong?