Hi Kevin,
Ideally you have to configure the the URL(s) using the "Reporting Services Configuration manager", one of the tools available as part of reporting services installation on your server, you have to configure the "Report Manager URL" and / or "Web service URL" depending on your needs..

Best regards
Rahul Desai, PMP
Microsoft Certified Technology Specialist (MCTS) | WSS, MOSS, SQL Server 2008
+61 408699686 | http://RahulBlog.NationalCom.Com