Thanks.

Now I got another problem. I push on the left side rotary button. the Nav scree stays on Menu or what ever the original nav screen was showing. I can't even turn on the radio.

Yes. I did read the menu. it say "push the left hand rotary button".

Also the DSP item disappear from the Menu. I swear I saw it there before and when I selected DSP it goes into the frequency adjust menu. but now I can't even find where is the DSP item.

I feel I am a idiot now