Dear Ahmad,
Thank You for your quick answear. I don’t have response on my email. I have notification about Your answear on the forum and mail about new webinar.
I found what cause this problem, it is something wrong with my web browser. When i try to use Firefox I get error, but when I use Opera I can download files. Now I download all files except OptiSystem 19, because as I mentioned earlier is blocked due to 3 times attempts to download.