If you are using Web Gateway as the proxy, then you do not need the TrustedSource DB in Web Reporter. Are you sure you need it?
Regarding the error, it means that that the serial number isn't active. So maybe you haven't activated it, or it's not a valid serial number. Send me the serial in a private message and I can check it.
Does serial number becomes inactive after support for "Web Gateway" and "Web Gateway Reporter" expires? ... When I try to download latest version of "Web Gateway Reporter" through Extranet.webwasher.com I get "This grant has expired message". I see no other reason for our serial number to stop working?
I am still looking for help on this one ...
you should provide the serial number to support, since they can verify if the number is still valid and/or find out why the download server reports it as inactive.