Hello, I have a problem, I changed the battery and can not unlock my radio.if we introduced the radio chia! Series is M257279 and unlock code is 4328 but did not go .Tell me wait 30.00 and start over .In the left figure below displays 8.Please help me with some information, thank you! He is the 2004 ford focus. And radio is 6000 CD RDS eon!