Can't access admin page

My D-link604T has lost its connection. Based on previous advice on these forums I unplugged the router for a couple of minutes and tried again with no luck. I then tried to access the router admin pages on but I am just getting the ‘page not found’ malarkey. Any ideas folks?

are you sure this is your router ip? open a command prompt, type in ipconfig /all and press enter. look for the field(s) ‘Default Gateway’ and ‘DHCP Server’ (they should be the same).