You need to make a UDP Protocol as well.
Try this:
Delete the first one you added
TCP 28000 28032 -IP Address- Blockland (Enable)
UDP 28000 28032 -IP Address- Blockland (Enable)
If you cannot create one under the same Address, or using the same name; Which is highly likely. When you click the word TCP is there an option that says TCP/UDP ?
If not, and there is a port conflict because of the two same ports; Change the last number on the IP address up ONE number on ONE protocol. If it still has a port conflict, made the UDP comment say Blockland1.