Hi,
Have you installed Sniffer Reporter v4.x for Sniffer Pro, on the same machine as the console software!?!
From exprience this causes neither to work. You can only have one version of the reporter software installed (either reporter v4.2 for Sniffer Pro, or sniffer pro and console), hence the earlier comment of not installing reporter if you are using the console software.
To get around this you'll going to have to do a manual un-install, remove all sniffer progs (add/remove progs), remove program files, and then remove the Network Ass Inc Registry Keys. See manual for complete instructions. Then install 2 of the 3 progs!!!
Alf