What apiVersion should I be using...

I have created a SL 2.0 Beta 2 application. I am putting it into a Vista gadget. My Vista gadget keeps showing "Install Silverlight". I have tried many combinations but it always shows the install.

<host name="sidebar">
      <base type="HTML" apiVersion="2.0.3" src="TestPage.html" />
      <permissions>Full</permissions>
      <platform minPlatformVersion="0.5" />
</host>

When I click on the install button I get this information from the silverlight site.


installed version 2.0.30523
requested version 2.0.30226
 
Any help would be great, thanks. :) ...