Unable to get file list from Windows Explorer on Seven 64 bits

I am unable to access the list of files from Windows Explorer on a Windows 7 64bit. The tests run fine on other Windows versions (including Windows 7 32 bits). My settings are the following:

1. testcomplete version  8.50.618.7


2. plugin MSAA and DirectUIHWND added in the MSAA options

In the Object Browser I get the following items:

• Windows 7 32 bits:


•   Window ('CabientWClass', 'D:\tests\keys', 2)


•     Window ('ShellTabWindowClass', 'D:\tests\keys', 1)


•       Window ('DUIViewWndClassName', '', 1)


•         Pane ('Volet de l'Explorateur')


•           ToolBar('Module de commande')


•           Panel('Volet des détails')


•           Window ('CtrlNotifySink'; '', 3)


•             Window ('SHELLDLL_DefView', 'ShellView', 1)


•               List ('Vue d'éléments')


•                 ListItem ('xxxx')


•                 ListItem ...


• Windows 7 64bits:


•   Window ('CabinetWClass', 'D:\tests\keys', 1)


•     Window ('ShellTabWindowClass', 'D:\tests\keys', 1)


•       Window ('DUIViewWndClassName', '', 1)


•         Window ('DirectUIHWND', '', 1)


•           Panel(0)


•           MenuBar('Système)


•           Window ('CtrlNotifySink'; '', 3)


•             Window ('SHELLDLL_DefView', 'ShellView', 1)


•               Window ('DirectUIHWND', '', 1)


•                Panel (0)


•                MenuBar('Système)

In the 64 bits version the Panel('Volet des détails') and the List ('Vue d'éléments') are replaced by Window ('DirectUIHWND', '', 1). I am unable to acess the list items in W7 64 to select the dedicated file. From what I have read in other posts on this forum 'Vue d'éléments' is replaced by 'Items View' on english Windows. The objects list shoud be the one in the W7 32 version. I have checked the settings in TestComplete and in the operating system and I am unable to detect any difference. What can I do to correct the script on W7 64 bits? TIA