After installing SharePoint 2010 and implementing the Toolset, there are two items to keep in mind when implementing your new Web Applications.

1) The server has no clue where your web application is. In my case, I implemented 2010sandbox.corasworks.net. When my Custom Display Adapter tried to call a page within the site via the “<%SiteURL%>” variable it errored saying that 2010sandbox.corasworks.net could not be found. To fix this issue I went ahead and setup my host file to point to the local server URL.

2) After I got the first problem fixed, came the next problem, “401 Unauthorized”. We know this one. It has to do with the Disable LoopBack check. Yes, I didn’t follow my own written instructions. As you will see in the Toolset Installation zip, we have a knowledge base article on how to get around the issue. One note on this issue, after applying the registry fix, a restart of your server is no longer required.

In case you are wondering, I was able to know what errors were occurring because I added “?debug=true” to the end of my page URL. With that it I was able to see the exact errors.

Hope this helps