not able to register or deploy the web client plugin on 5.5 setup

Hi,

I am not able to register or deploy a web client plugin on 5.5 setup. The confusing part for me is this "vsphere-client-serenity" folder. I don't see any such directory in the vmware directory path. This is the path C:\Program Files\VMware\Infrastructure\vSphereWebClient.

Following is the context of extension.xml file:

<extension>

  <description>

  <label>AB</label>

  <summary>AB vSphere plugin</summary>

  </description>

  <key>com.XYZ.ab</key>

  <company>XYZ</company>

  <version>1.0.0</version>

  <client>

  <version>1.0.0</version>

  <description>

  <label>AB plugin</label>

  <summary>AB Vsphere plugin</summary>

  </description>

  <company>XYZ</company>

  <type>vsphere-client-serenity</type>

  <url>http://localhost:8080/ab.zip</url>

  </client>

  <lastHeartbeatTime>2012-07-21T00:25:52.814418Z</lastHeartbeatTime>

</extension>

What is this "type" tag? As per the documentation of plugin deployment it must be set to "vsphere-client-serenity". When I try to register this extension file using vsphere desktop client (5.1) it registers it successfully but in the status it says "no client side download is needed for this plug-in." The URL mentioned about is working correctly.

I am just beginner in this. Please excuse me for any basic mistakes/misunderstanding.

Thanks.