Thanks Bun for the offer to help.

In fact, I'm guilty of a bit of hyperbole, since the HAVA support team did in fact call me at home and worked with me for nearly an hour. We tried everything, from un-installing and re-installing the software, checking versions, to changing network settings on the router, etc. Nothing worked. BTW I have a PC, running Vista. I have a Netgear G router with no security key. The error message: "Unable to find HAVA device." was most frustrating because it always came after about ten minutes of waiting through the setup process.

In any case, someone from HAVA called me today and they are sending a replacement unit. I can't be sure till I try the new unit, but I'm pretty sure it is a hardware issue. If nothing else, they are working very hard to ensure customer satisfaction!