Client Plug-In registered successfully but UI not visible

I have successfully deployed my plugin on to the vCenter server. Please find a portion of the virgo server log attached.

In the web client I am able to see the plugin:

But I am unable to see the UI of my extension. The following is my plugin.xml:

<?xml version="1.0" encoding="UTF-8"?>

<plugin id="com.vmware.xvmotion-ui"

      defaultBundle="com_vmware_xvmotionui">

   <resources>

      <resource locale="{locale}">

         <module uri="locales/xvmotion-ui-{locale}.swf"/>

      </resource>

   </resources>

<extension id="com.vmware.xvmotion.vm.manage">

      <extendedPoint>vsphere.core.vm.manageViews</extendedPoint>

      <object>

         <name>#{migration.name}</name>

         <componentClass className="com.vmware.vsphere.client.htmlbridge.HtmlView">

            <object>

               <root>

                  <url>/vsphere-client/xvmotionui/resources/vmigrateDetails.html</url>

               </root>

            </object>

         </componentClass>

      </object>

       <metadata>

         <objectType>VirtualMachine</objectType>

      </metadata>

   </extension>

</plugin>

The location "/etc/vmware/vsphere-client/vc-packages/vsphere-client-serenity" contains the unzipped contents of my plug-in.

The extension manager in the mob contains the following information:

I am unable to find out where I have gone wrong or what has gone wrong. Please help.

Thanks,

Nikhil