I can not remember my wi-fi password. i need it to

If you have tried the default passwords (blank, admin or sysAdmin) and they don't work, you will need to reset it back to factory settings. You can do this by finding a hole at the back of the unit and pressing the hidden switch there for a few seconds. After that it should be back to its original configuration. You will obviously have lost any changes you made to it since you took it out of the box.