How do i change my router from secure to open?

my comp said it was having a problem with the profile and suggested deleting that one and creating a new one. so i deleted and tried to create a new profile and got to the first password, a device ownership password. i don't remember putting one in in the first place but where it says to look on the router to find it i couldn't find one. i tried like 7 or 8 0's and that got me through. it then asked for network name and security type which both were set. it also asked for the password (key) which i tried putting in and it wouldn't accept. i've gotten fed up and decided to try changing the security type on my router to open. how do i go about doing this on a d-link router ???How do i change my router from secure to open?
The easiest way to fix this problem is by just resetting the router and recreating your network. Push in the reset button on the router and hold it. This will erase all settings and it will be as it was when it came out of the box. Set up new network without encryption and you are ready to go. Good luck!!!