How to properly set up autoresponder.

Hello

I'm triyng to set up an e-mail campaign with autoresponders but something is not working.

After sending the first mail(1) of the campaign i set up a calendar-autoresponder with a second mail(2) to be fired on a certain date.

Now i need one more autoresponder to send a new mail(3) only to those who opened the second(2) email. But when i try to create a new action autoresponder i can't see the previous calendar-autoresponder in the dropdown menu.
I can pick only old autoresponder but not the one i need.

I don't get what is wrong. Thank you.