Not sure Rich. I don't see how to select a single program. Under Options, is "Suppress Continuous Alerts based on first response" checked?
What happens if you move loading your gadget into delayed start? The easy way to do this is to right-click on it under Startup Programs, then select Move to Delayed Start list.
BTW, I never could get my Pandora gadget to work properly. As that was the only gadget I was still using, I abandoned gadgets altogether. I have since discovered
Pandorian, a really nice desktop client for Pandora. Highly recommended for all Pandora and music lovers.