got a new battery today, radio reset... no big deal right?

well i got the code and entered it in.. i missed a number and got it wrong.
tried it again (because i thought i entered it in right)
did a 3rd time and entered it in. it didnt work.

now the radio isnt accepting any codes even though it still says code..

can anyone help me? i unplugged the batter for now. how long should i wait before i try again? thanks for the help anyone!