Belkin port-Forwarding issues?

Hi, I am trying to port forward so I can have a server on minecraft. I go to 192.168.2.1 website and click virtual Servers then name it Minecraft, inbound port is 25565, then TCP, then My I.P. ends with a 2, which I have checked using multiple programs and websites, and my private port is 25565. Now after I hit apply changes an error pops up and says "No1.The IP that you entered is invalid". Now many people say to update my firmware on my router. I have done that and its still having this issue. Is there any way to fix this issue?