masternode still needs 112 coins ??
cause everytime i try to start the masternode its says "not capable masternode: Could not connect to xxx.xxx.xxx.xxx:port"
but port is open and forwarded and ip address (public) is correct
It looks like you have a problem with the router. When the MN starts, it tries to address itself using an external address.
Try to pick up another network interface:
sudo ip link add dummy0 type dummy
sudo ip addr add xxx.xxx.xxx.xxx/32 dev dummy0
sudo ip link set dummy0 up
xxx.xxx.xxx.xxx - your external IP
I do not speak good English, so I apologize for the possible non-exact phrases.