Topic: Ultralight C authenticate fail

Hi guys,
    I try authenticate the ultralight C ,but fail.
   
    Key={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f} ;
    RndA={0x74,0xbd,0x85,0x75,0x7b,0xd2,0x8b,0x77} ;

    --->  1A00   
    <---  AF35ED9336BDAC62
    --->  AF5EBD4F987D6A12A18D8CEBD0BF9F699F
    <---  NAK 0h
     
    Is there any problems?