NFCISO15693 write failing

let i = NFCISO15693RequestFlag.RequestFlagHightDataRate
  let ACTIVATION_BLOCK_INDEX = 1;
  let data = Data(bytes: [0xAD, 0xC2, 0x07, 0xA0, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00] as [UInt8], count: 8)

tag.writeSingleBlock(requestFlags: i, blockNumber: UInt8(ACTIVATION_BLOCK_INDEX), dataBlock: data, completionHandler: {
 error in
 if(error != nil){
}
})

I am getting error "Tag response error"

Please help.

NFCISO15693 write failing
 
 
Q