Why can't I start by double clicking on Outlook under Vista?

Q: Double-clicking Outlook Express, but showing "Unable to start Outlook Express. The application could not open the Outlook Express mailbox. The computer is out of memory or the disk is full. Please contact Microsoft Support for further assistance. (0×8007007E, 126)", click "OK", and a pop-up dialog box appears, "MSOE.DLL could not be initialized, Outlook Express could not be started." Outlook Express may not be installed correctly. A: Open the registry, navigate to HKEY_CLASSES_ROOT\\CLSID\\{4A16043F-676D-11d2-994E- 00C04FA309D4}\\InprocServer32, and change the value of the right window (default) from %SystemRoot%\\System32\\dllcache \\directdb.dll to %programfiles %\\common files\\system\\directdb.dll Tip: For primary computer users who cannot locate registry keys, copy the following characters to a blank notepad and change the suffix name to *.reg. Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\\CLSID\\{4A16043F-676D-11d2-994E-00C04FA309D4}\\InprocServer32] @=hex(2):25,00,70,00,72,00,6f,00,67,00,72, 00,61,00,6d,00,66,00,69,00,6c,00,65,\\ 00,73,00,25,00,5c,00,63,00,6f,00,6d,00 ,6d,00,6f,00,6e,00,20,00,66,00,69,00,\\6c,00,65,00,73,00,5c,00,73,00,79,00, 73,00,74,00,65,00,6d,00,5c,00,64,00,69,\\ 00,72,00,65,00,63,00,74,00,64,00,62 ,00,2e,00,64,00,6c,00,6c,00,00,00 "ThreadingModel"="Both"