If you updated your DSP firmware to 3.0, you will also need to roll that back to version 1.3 if you want to fully bring your PRO-668 back to the latest "stock" firmware released by Radio Shack. You can do that by using the Radio Shack iScan program AFTER you convert your radio back to a PRO-668. Go to "Check for DSP Firmware Update" in iScan and load the DSP version 1.3 back into your PRO-668.