problem with usb adaptor
 

good afternoon for Greece.I have Honda Civic Model 2006 and i buy one adaptor for USB.Put cable the back of Radio and put in the cable the adaptor.But i have problem.
When i do connected adaptor to the cable when car is off and after start engine don't play sound (Radio,cd..all..).
2.if connect in the cable the adaptor when car on play sound (Radio and cd) and read usb flash but it can't play and i try to push cd/aux but i can 't see anything.
i try but i can't play usb flash with music.
And the usb flash i have foldrers with name CD01 etc and songs is mp3 with name track1 etc?

Can help me someone?

Thanks

Kostas