Multiple Gateway error message

[bklyn1028]

I have had a static ip address for years. I host games online. My grandson now has a static ip address (he hosts his own games)..My pc is wired, his is wireless - same router.
Port Forward checker said "your port is unreachable" this morning. When I re-configured the static ip address, I now get a "multiple gateway" error message, and the end says do I want to continue. If I say yes, the port is still unreachable. I can get on the net, but can't open any ports. Is there a way to configure 2 pc's with static ip addresses on the same network with one router?

 

[Shadowjk]

You normally get this error message when you have multiple interfaces on a machine that has the same default gateway configured. I would keep your configuration the same as you had before and verify your port forwarding settings on the router.

The reason for the port blocking may be caused by an improper NAT configuration on the router or a blocked port by your ISP. What is the make/model of your router and then ports that need to be opened for the two devices?

I can see if I can provide a step by step process in resolving this issue

Many Thanks,
Josh