Entry into the User Manager causes an error.  There are actually two places where trouble can creep in here.  One is a bug and the other a parameter choice that will foul up anyone not using the default datasource name.  Both are located in the same file...
 

• Line 9, /admin/user_boss.cfm.  Change this:
  
       <cfset localGrid.PageLevel=1>
  
  to this:
  
       <cfset variables.PageLevel=1>
   
   
  
• Line 28, /admin/user_boss.cfm.  Change this:
  
       request.GridMonger.DSN="accessmonger";
  
  to this:
  
       request.GridMonger.DSN=request.AMPro.SiteDSN;