RF Transmitter and Receiver WRL-10535 and WRL-10533

Are you getting any of these?

  switch (chk)
  {
    case 0: Serial.println("OK"); break;
    case -1: Serial.println("Checksum error"); break;
    case -2: Serial.println("Time out error"); break;
    default: Serial.println("Unknown error"); break;
  }

is this doing anything now?
char *msg;