What else will I do? About six years ago I attended a citizenship interview and failed.. Reason did not pass some of the civics questions. Do I need

Yes, you would need start the naturalization process again. You will need to file a new Form N-400 with USCIS. You will be scheduled for another interview where you will need to take the English and civics/history test. You can read more about naturalization at http://myattorneyusa.com/citizenship-and-naturalization.