vSphere ESX 4.1 changing default ports 80 and 443 ???

Hiya,

I'm having problems trying to change the default ports so that i can move my exchange server into VM.

I've tried what it says on the forums here but i just can't get it to work. VMware KB article 1021199

The proxy.xml has about 72 lines in it but i've put this at the top, bottom, no joy.

The top of my proxy.xml now looks like

<ConfigRoot>

  <httpPort>81</httpPort>

  <httpsPort>444</httpsPort>

  <the rest of the file>

  </the rest of the file>

</ConfigRoot>

I've changed the ports in my Client file too.  <add key = "protocolports" value = "https:444;http:81" />

All i get is cannot connect to the server.

I've also tried adding the port to the name such as 192.168.5.111:81, no joy.

What am i missing here ?

Any help much appreciated, taa.

AndyB