Provider must implement the class 'System.Web.Profile.ProfileProvider'.

I currently have web site running custom role, membership, and profile providers. I also have a Windows Application calling these custom provider services. This has been working fine for years.
Now I have a request to build a ASP.NET web application that can call the current custom role, membership, and profile service. I my web application I was able to set the web.config to call the Authentication_JSON_AppService.axd and Role_JSON_AppService.axd just fine and both IsInRole and IsAuthenticated is working fine on the new ASP.NET web application calling my old custom role and membership service.
The Profile_JSON_AppService.axd is not working.  When I call HttpContext.Current.Profile I get "Provider must implement the class 'System.Web.Profile.ProfileProvider'." error.