Can you try the following steps to initiate a Full Crawl of your site:
1. Go to the Search Settings page in the Central Administration site > SharedServices1.
2. Click the link Content Sources under the Crawling section.
3. Click the Server item and click Start Full Crawl from the listed options.
4. Periodically refresh the page until the entry in Status column is set to Idle.
Once this is done you should be able to see the metadata properties.
Hope this helps.