Nokia Accessories :: Ck7w Does Not Turn On When Turn On Car

i have put a nokia ck7w into my car yesterday. my ck7w does not turn on when i turn on the car and sometimes it turns itself off. all of the connections are 100% secure and the fuses are fine. i have to use the nokia button to turn it on but i would like it to turn on when i turn the key. i have connected the red wire to the +12v from my cd player, the blue wire to the cd player's ignition line, the black wire to the cd player's ground and the yellow wire to the cd player's mute connection. what do i do. the kit does automatically turn itself off when i turn off the car.