The correct Honda radio codes only use the numbers 1-6 since there are only 6 buttons. Where did you get the code with a 0 and a 9 in it? Best way is to retrieve it before disconnecting the battery. I presume you tried using the "Radio Codes" sticky since you also posted this question there. If that didnt work you may need to stop by a Honda dealer.
The year and model of your Accord would also be helpful.