I took off the battery and now when I started my car the radio is not working. My code is 3454 but I am having difficulty entering it. The car is 2000 model and has a cd player and tape recorder in it with a narrow screen. It says (step/trial) 1 then I enter (press) 3 but then I cannot enter the remaining numbers of 3454. It just takes it to (trial) 2. Then I have to enter a number again and it takes me to trial 3 and then it switches off for twenty minutes. How can you enter all 3454 all at once. Thank you.