There could be a number of issues here, and narrowing it down will take some work.
To start with, where did you purchase this radio from? Was it a -new- radio, or did you purchase it used?
What is the full model number off the back of the radio (under the battery)?
What version of software are you using? Not just KPG-160D, but what revision?
Read the radio and let me know what firmware version it is, too.
While these radios do come pre-programmed, they are programmable via PC. However, there are a number of variations that play into this here that need to be considered. Answering the questions above will help me narrow down the probable cause.