I made some simple changes to some forms and I rebuilt a new exe and redistribute it to the clients machines.   The application runs fine on my development machine.  But when I try to run it on the client machines it gives me the errors below.  From what I can tell through additional testing, the errors are occuring for ALL combo boxes I am populating using the BO with the PopulationDataSourceSettings/PopulationType properties.   What is really strange is all of these forms and combo boxes and BOs have been working fine for a long time!?!?   Help?

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Type 'CMPR.LocationsViewBO' could not be found in the referenced assemblies.
  Exception (Exception): Source="MicroFour StrataFrame Base"; Target=null; Tag=null;
    Message = "Type 'CMPR.LocationsViewBO' could not be found in the referenced assemblies."
    InnerException (FileNotFoundException): Source="mscorlib"; Target=null; Tag=null;
      Message = "Could not load file or assembly 'DevExpress.XtraReports.v8.1, Version=8.1.1.0, Culture=neutral, PublicKeyToken=9b171c9fd64da1d1' or one of its dependencies. The system cannot find the file specified."
      StackTrace =
          "   at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
             at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
             at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
             at MicroFour.StrataFrame.Tools.Common.GetTypeFromReferencedAssemblies(String TypeName)"
      FileName = "DevExpress.XtraReports.v8.1, Version=8.1.1.0, Culture=neutral, PublicKeyToken=9b171c9fd64da1d1"
      FusionLog =
          "WRN: Assembly binding logging is turned OFF.
          To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
          Note: There is some performance penalty associated with assembly bind failure logging.
          To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
          "
  Environment: ThreadIdentity="" DateTime=["2008-05-01 11:41:17.099"] ThreadName=null WindowsIdentity="STRUSS\JPagley" ThreadId="1" DomainName="cmpr.exe" OSVersion=["Microsoft Windows NT 5.0.2195 Service Pack 4"] MachineName="INVENTORY"
    UserName="JPagley"
  Remaining Stack Trace  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    at MicroFour.StrataFrame.Tools.Common.GetTypeFromReferencedAssemblies(String TypeName)
    at MicroFour.StrataFrame.UI.Windows.Forms.ListControl.PopulateComboFromBusinessObject(IListControl lstControl, Object[] Parameters)
    at MicroFour.StrataFrame.UI.Windows.Forms.ListControl.PopulateCombo(Control lstControl, Object[] Parameters)
    at MicroFour.StrataFrame.UI.Windows.Forms.DevEx.ComboBoxEdit.PopulateCombo(Object[] Parameters)
    at MicroFour.StrataFrame.UI.Windows.Forms.DevEx.ComboBoxEdit.Requery()
    at MicroFour.StrataFrame.UI.Windows.Forms.DevEx.ComboBoxEdit.InitializeObject()
    at MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.InitializeFormLoadObjects()
    at MicroFour.StrataFrame.UI.Windows.Forms.BaseForm.OnLoad(EventArgs e)
    at System.Windows.Forms.Form.OnCreateControl()
    at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
    at System.Windows.Forms.Control.CreateControl()
    at System.Windows.Forms.Control.WmShowWindow(Message& m)
    at System.Windows.Forms.Control.WndProc(Message& m)
    at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
    at System.Windows.Forms.ContainerControl.WndProc(Message& m)
    at System.Windows.Forms.Form.WmShowWindow(Message& m)
    at System.Windows.Forms.Form.WndProc(Message& m)
    at System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m)
    at System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m)
    at System.Windows.Forms.Nativewindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)