I'm trying to setup an ES datasouce in the Global.asax file and I'm having a hard time finding the reference to MicroFour.StataFrame.Data.Enterprise.EnterpriseDataSourceItem.  Is there a particular library I need to <%@ Import "" %> into the Global.asax or include in the website references?

Glad you got it going.  Just FYI, when distributing, you realy just need to make sure that they are in the Bin folder (or a respective data folder).