Port forwarding KPN Box 12 doesn't seem to work

Hello, 

Trying to do a portforwading config on my KPN Box 12 router and I did add it to the list, pointed it too my server running on port 8080 and gave it a local port 9002. But when trying to access that server via my public_ip:port I don’t succeed. Does someone know if there is a problem? Blocker maybe?

Thanks.