SparkFun Mp3 Player Shield SD Card Problem

Hi everyone,

I use Arduino Uno and SparkFun Mp3 Player Shield. I open File Player example.
In serial ports screen, there is an error !

F_CPU = 16000000
Free RAM = 1051 Should be a base line of 1017, on ATmega328 when using INTx
Can't access SD card. Do not reformat.
No card, wrong chip select pin, or SPI problem?
SD errorCode: 0X1,0XFF

what can I do ?
Please help :confused: