Open Graph tags are cached by Facebook and other social networks. If you just added them, they may not show up immediately until your page is re-scanned.
You can use tools like the
Facebook Debug Tool
to refresh the cache and see what Facebook sees.
If the tags still don't look like they're working, please let us know:
a) How you added the tags and 1-2 tags you added
b) A page where you expect those tags to show
We'll gladly help investigate.
Thanks,
Alex