Wcf – What exactly do I need to do to host a WCF service in IIS 7.0 using netTcpBinding

I've been trying for more than a week without any success at all, to host a very simple HelloWorld-like wcf service using netTcpBinding.

With http, everything is ok. I can access my service even from a remote machine. But with tcp problems arise.

I have performed all the steps I'm supposed to, in order to host my service in WAS:

• .Net 3.0 Features are enabled, including http and non-http Activation

• I have granted 'Network Service' and 'IIS_IUSRS' the following permissions to the folder containing the site:

  • Read & Execute
  • List Folder Contents
  • Read

• Opened de ports 8100 and 8086 in the firewall.

• At IIS Manager/ Actions / Bindings the following bindings are set up:

  • http 8100:*
  • net.tcp 8086:*

• At IIS Manager/ Manage Web Site / Advanced Settings, both, http and net.tcp protocols are enabled.

The original problem I had was that I was able to reach the service via http but when trying with tcp I got the following error:

"The message could not be dispatched because de service at the endpoint addres 'net.tcp://myDomain/HelloWorld.Hello.svc' is unavailable for the protocol address."

I found a post in this site whose author had the same problem and It was solved by reinstalling .net 3.0 features. So I tryed that. I also tryed to reinstall IIS 7.0 just in case.
Now, the situation is worse than it was at the begining. If I configure an endpoint with tcpBinding in my Web.Config I can't even reach my service at it's http address using IE!! I get the following message:

Could not find a base address that matches scheme net.tcp for the endpoint with binding NetTcpBinding. Registered base address schemes are [http].

The Web.Config file is as follows:

       name="HelloWorld.Hello">
       <host>
          <baseAddresses>
             <add baseAddress="http://myDomain:8100/HelloWorld/" />
         <add baseAddress="net.tcp://myDomain:8086/HelloWorld/" />
          </baseAddresses>
       </host>          

       <endpoint address=""
                 binding="wsHttpBinding"
                 contract="HelloWorld.IHello"
                 bindingConfiguration="httpInseguro">
       </endpoint>

       <endpoint address=""
                 binding="netTcpBinding"
                 contract="HelloWorld.IHello"
                 bindingConfiguration="netTcpInseguro">
       </endpoint>


       <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />

    </service>
 </services>

<bindings>

  <wsHttpBinding>
    <binding name ="httpInseguro">
      <security mode ="None" />
    </binding>        
  </wsHttpBinding>

  <netTcpBinding>
    <binding name ="netTcpInseguro">
      <security mode ="None" />
    </binding>        
  </netTcpBinding>

</bindings>

and the .svc file is like this:

Could anyone please give me a clue about what's going on? I really don't know what else to do. This is being a real headacke becasuse using http binding is not an option.
Thanks in advance.