This form template is browser-compatible, but it cannot be browser-enabled on the selected site. This may be caused by one ...

This form template is browser-compatible, but it cannot be browser-enabled on the selected site. This may be caused by one of the following reasons:
   - The server is not running InfoPath Forms Services.
   - The necessary features are not available on the site collection.
   - The policy setting on the server does not allow users to browser-enable form templates.