Make sure you download the latest version of MetaTraffic, at least to update the definitions.
Download the latest version of MetaTraffic Lite here:
http://www.metasun.com/products/metatraffic/download.asp to obtain the latest data files in the MetaTraffic Lite download. Definition files for both Pro and Lite are the same.
In the Settings > Maintenance section, use the Update Countries and Update Definitions options to update each data file respectively. You can use ftp to upload the data files to your data directory. Alternatively, you can use the web based upload tool to upload them in the Maintenance section.
You can check the latest definition or country file date by looking at the main page of Settings. It will show a serial date for when each was last updated.