are you sure you are forwarding the port to correct computer.
open a cmd window and type: ipconfig
in there you will see your LAN ip , it looks something like this : 192.168.1.2
so if it is 192.168.1.2 make sure you forward port 1000 to that ip.
also dubblecheck your firewall , windows defender..??
goto
www.canyouseeme.org start hfs and test if port 1000 is open.