I HAVE A TC1000. THE DAY I BROUGHT IT HOME I FOLLOWED THE INSTRUCTIONS AND CONNECTED IT TO MY PC SERIAL PORT AND THE PROGRAM WOULD NOT EXECUTE. I KEPT GETTING A MESSAGE "TC1000 NOT CONNECTED". I TOOK IT BACK TO THE STORE AND BROUGHT ANOTHER ONE HOME AND THE SAME THING HAPPENED. I HAVE A LAPTOP AND A DESKTOP, BUT ON EITHER UNIT I GOT SAME RESPONSE. HAS ANYONE HAD THE SAME PROBLEM? OR CAN THIS BE DUMB LUCK. I'M CONTEMPLATING GETTING A PRONTO. SOMEONE PLEASE GIVE ME SOME INFO.