Perhaps one of your configuration files is corrupt, usually the main setup.dat file. Try moving all of the .dat files out of the configuration data directory and run NL again. If there error goes away then it was one of those files. You could move a few of the files back in until you find the corrupt file.
Please be aware of and use the following pages... Services Status Page : SuperSearch and Usenet Access server status, retention, server load, indexing time, etc. Support Request Form : Use this if you have a problem with billing or account status. The forum is only for NewsLeecher application issues.