Have a D-Link DI 514

Have a D-Link DI 514 router with a Charter Cable Modem (typical of CHARTER...no brandname model U100018). Running three computers hardwired to the router. All of the sudden lost internet connections on all three computer> troubleshot with CHARTER powered off both computer and router. Disconnected router, connected modem directly to main computer perfect connection. Router was installed by someone in the dim past. tried to check D-link support where they mentioned IP address should be 192.168.0 soemthing...did ipconfig and my IP Address is 24.205.64.108...All WAN/WLAN lights are lit when it is connected....wanted to try D-link diagnostic but cannot get to browzer while router is connected. Help Jim Crum La Canada CA.