Connect to nodejs through public ip address

Question

I have a basic node express app running on port 3000.
I can access it via 127.0.0.1:3000, my private ip is 192.168.1.2 I've set up portforwarding in my d-link router as followed:

Private IP       Protocol Type     Public Start Port   Public End Port  Connection      
192.168.1.2      ALL               3000                3000             PVC0

When I try access via "public_ip":3000 I get net::ERR_CONNECTION_REFUSED

I disabled router firewall and windows firewall to cross them out as the problem, and I've used an online port scanner to make sure the port is open.

Any one know what the problem could be?