Cannot Connect to LAN Party

Hello.
I have tried to start a Hardcore LAN Party by connecting two laptops with a router. Upon starting the LAN server on one laptop on a single-player world, it gives an IP of 0.0.0.0:49686. After checking on the other laptop, it displays the LAN world in the Multiplayer List with the correct IP address. As I connect, it displays "Connecting..." for half a minute and it responds at the end with "Connection timed out - connect." I've enabled Minecraft through the Windows Firewall and I've disabled the router's firewall yet it still refuses me to connect.