cant able to login routerboard 433 urgent

Hi

I cant able to login in mikrotik routerboard 433
when i logged first time i changed some user interface ip and forgot to give subnet and clicked ok
now when m trying to login with that ip, its not working
pls let me know how to reset fully

i had tried with jumper one but its not resetting
Its urgent.
thanks

use MAC-WinBox

Use Mac address to access it via winbox
When you are conneted to the routerboard, launch winbox and click the button next to the "Connect to " field. This should display the Mac address of the routerboard and the ip address, click on the mac address and supply ur password.
you can also use neibour viewer.

You can reset the board by holding down the reset button on the board while it boots.

Good luck