1. First of all, are you sure the Corolla is OBD-II?
2. Make sure you use the correct COM, is it blutooth device? If yes make sure you pair the device and the pc.
3. Have you tried any other OBD-II interface and is it working?
4. If you have windows mobile phone available, try OBDGauge, it should work
5. If not, try Digimoto, easy OBD to see what happens.