Which version of Windows are you using (I am assuming your using Windows of course let us know if you are not).
The problem is that your computer is likely either configured with a static (put in by hand) IP address which is unlikely to match 192.168.0.1 or it is set-up to dynamically obtain an IP address.
If it is set to dynamically obtain an address but fails to it will default to 192.168.0.1, since this exactly matches your router it will not work either.
So that's the problem here is the solution, you need alter (possibly temporarily) the configuration settings for you computer.
These are the Windows XP instructions, hopefully you can find the right thing to do for other versions of Windows from these.
- Open Control Panel
- Open Network Connections
- Select Local Area Network (LAN)
- Open "Properties" or "Change settings of the connection" for LAN
- Select "Internet Protocol TCP/IP" in the list
- Press "Properties"
- Option 1: If "Obtain an IP address automatically" is not selected select it
- Option 2: Allocate a static "IP address" 192.168.0.50, allocate a "Subnet Mask" 255.255.255.0, allocate default gateway "192.168.0.1".
- OK and wait for network to start
Then you should be able to connect to you router. Once you have it working you may want to go back and select option 1 "Obtain an IP address automatically" as this is less likely to cause issues in the future.