一段CRC32算法，帮忙看下是否有错误

        static UInt32[] crcTable = {
            0x0, 0x77073096, 0xee0e612c, 0x990951ba, 0x76dc419, 0x706af48f, 0xe963a535,   0x9e6495a3,.......            
        };        public static UInt32 GetCRC32(byte[] bytes)
        {            
            UInt32 crc = 0xFFFFFFFF;
            for (int i = 0; i < 12; i++)
            {
                crc = ((crc >> 8) & 0x00FFFFFF) ^ crcTable[(crc ^ bytes[i]) & 0xFF];
            }
            return crc ^ 0xFFFFFFFF;
        }        private void button1_Click(object sender, EventArgs e)
        {
            byte[] bytes1= {0x02,0x00,0x01,0x31,
                            0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
                            0x00,0x00,0x00,0x00};
            UInt32 result = GetCRC32(bytes1);
        }得到的result = 0x4e66e75f；而正确的应该是0x34aae691程序中是否有错误，烦请请各位大虾指正。