You don't need to ping them. Google will find most itself.
Google/Yahoo won't show your backlinks only after a few days. I reached second position with my site and yahoo showed 0 backlinks at that time.
You can use scrapebox's index checker.
I have done that and see the exact number of backlinks which Yahoo shows.
Can I put the link code into the article and not in the resource box when using AMR?
Am I doing something wrong. As I said I have manually checked a lot of the articles. They all have the URL in the bottom and the link is correct. Still no SERPs change or backlinks recognized. Almost 3 days from the submission and the pinging.