Hi, I'm trying to host a web service and I'm following this thread. http://community.discountasp.net/showthread.php?t=7719 The problem is that I'm having the following error: "This collection already contains an address with scheme http. There can be at most one address per scheme in this collection." I've found that many people fix the error by putting this in the web.config file, but I don't. <serviceHostingEnvironment> <baseAddressPrefixFilters> <add prefix="http://mySyte.com" /> </baseAddressPrefixFilters> </serviceHostingEnvironment> (Of course I've changed mySite.com) Can anyone help me please? Thank You!