I’m really sorry that you have encountered problems.
I checked part 12 and part 13, both are available. Would you mind sharing what you get when you click on the links below? (I added the link of Part 13 based on the headline of your post, just in case).
Hi Dr. Sassi,
Thank you for your fast reply, yes when I click on link it’s working, but if i use my account, I don’t have the Part 12 in my list. It’s not a problem for the part 12 I’ll use your link.