Just so you know, I don't own or have access to the UBCD396T scanner. What version of firmware do you have now? Did you download the "Firmware Update Loader (Vers. 1.5.2.0)"? Did you download the "Firmware Upgrade (Vers. 1.14.03)"? What operating system does your computer have (version and service packs if any)? What type of serial port are you using (USB - Serial adapter or hardware serial port)? If you are using a USB - Serial adapter, what brand and model is it? (most will work fine, but you might need to have the latest drivers). Do you have programming software for your radio? If yes, do you know which Com Port the software is using? We need to know all these things in order to assist you.
Mark