You probably need to register the ATL.DLL file. Before doing that though verify that Outlook is set as ur default email client in IE [Tools > Options > Programs -- Outlook should be set as Email client] If that does not resolve the issue then perform a clean uninstall of DTM, then click start > run and type 'regsvr32 ATL.DLL' ... you will get a message stating it has been registered successfully. Restart your PC and then reinstall DTM. You should now see the MS Outlook translator listed