I got this very problem. That was terrifying experience .D-link Router Default password not working?
Here i got the solution:
- Do not put default password
- Remember what you have given your password at the time Quick setting
- Quick configuration will come after resetting router
- You are asked to fill as in given figure below
Log in not as your default password but as what have you given at the time of quick configiration..... and it's done
Hope this will work for you!