Check your windows firewall settings in addition to your anti-virus settings and any other firewalls you have installed. The game may need to be in the exceptions list for all of them.

I tried to ping that IP address and it is not working at all. Definitely check your IP online to make sure it's the correct IP. You can simply go online and google "what's my IP" on whatever system you have running your server and your public IP will pop up. This will differ from your local IP, the one you see if you use cmd to run ipconfig.

It's entirely possible you're just trying to do this with the wrong IP address. This is pretty much what GinsengSamurai is suggesting at the bottom of their last post as well. Most of us don't keep the same IP unless you've requested that from your ISP.