SO frustrated, need help with Digg Button plugin

I have found many blogs/posts on how to get the “Digg This” button on my posts. I’ve followed ALL of the directions, activated the digg plugin, but it still is not working. I’m incredibly frustrated.

All I’ve seen says to enter this:
[digg=THE URL OF MY POST]

But again, this does not work.

Please help? I would like this “Digg this” button on the right side of my post, towards the title/intro of the post.

I would appreciate any help you guys could provide, thanks so much.
Pamela