I follow all steps from tutorial and make a umbraco instalation in load balance. But, when i update certains contents like media, the cache dont update in all servers. 

Umbraco Version: 4.11.1
Asp.net version: 4
Windows 2008 R2 and IIS 6.5

My umbracoSettings.config is:

  <!-- distributed calls make umbraco use webservices to handle cache refreshing -->

  <distributedCall enable="true">

    <!-- the id of the user who's making the calls -->

    <!-- needed for security, umbraco will automatically look up correct login and passwords -->

    <user>0</user>

    <servers>

      <!-- add ip number or hostname, make sure that it can be reached from all servers -->

      <!-- you can also add optional attributes to force a protocol or port number (see #2) -->

 <server>j301.geraldoabreu.com</server>

 <server>j302.geraldoabreu.com</server>

      <!-- <server>127.0.0.1</server>-->

      <!-- <server forceProtocol="http|https" forcePortnumber="80|443">127.0.0.1</server>-->

    </servers>

  </distributedCall>

Someone help me!

Sorry for my bad english.