Dual xdvd710. cant find it anywhere on this site and i had this problem before ok it had a

Question

cant find it anywhere on this site and i had this problem before ok it had a password set on it and one day when i took off my battery it reset and my password would not work anymore so i drove around for 3 weeks without it and then i called tech support and they told me how to reset everything all good worked good and everything but now once again i took out my battery and im in the same spot as i was before and i wrote down the old code they gave me well what i thought it was but that dont work