Hi Karim,
Thanks for reaching out! I’m sorry you’re running into this issue.
I took a look at your site, and the Pro version actually appears to be up and running. For example, you can see in this screenshot that the Pro views are appearing as options in the filter bar: photo, week, and map. I’m not sure why you are seeing that message, but you can always verify that you are running the current versions of the plugins by going to the Downloads page on your account. I took a look at your system info, and everything seems to be up to date.
Once Pro is activated, it may not be immediately obvious that anything has changed. You will see some new tabs (such as Additional Fields) when you go under Events > Settings, and you will also have the ability to create recurring events (see screenshot – you’ll see a “Schedule multiple events” button appear on your event edit pages). Are there any Pro features that you notice are missing?