[44net] Not able to fill subnet IP

I am trying to register amprnet gate at IP 147.229.242.130 (ok0nmg.ddns.net) at portal.ampr.org but there is no offer to put a subnet (here 44.177.10.254/32). I ahve already registered 2 gateways before succesfully with their subnets but this a/m one its not possible to put a subnet. (The ampr-ripd system is running well on ok0nmg.ddns.net.) I need some help please. Best 73 Libor OK2PEN (PY2ZEN) sysop of gates ok2koj.ampr.org, ok2pen.ampr.org and ok0nmg.ampr.org