Help in pioneer DEH-P4700MP CD player

[automotive]

i have a pioneer DEH P4700MP CD player for 4 months , It work well at the begining , after that it began to show "Error-11" with some CD'S , i cleaned the CD and the problem is still present.
When i keep changing between Tuner and CD it works ( I may keep changing for 10 or 15 min. to work)
After that it stops playing MP3 CD'S ("Error-11")
But audio CD's is played well without any errors

So , Can anyone tell me what i can do ?????