I have the right code but it doesn't work ?!?

Dear,

My 6CD Radio Player on my Nissan Micra 2004 asks me the Code since I changed my battery. I have this code on my paper, I use the 1, 2, 3, 4 button to enter the code and use the TA button to valid it. But I show me always Error Code ??? So I wait 1h, code ---- appears.

Any help is welcome

BP5365 56444443
7645 365 618

Thx