Mapped network drives do not connect at logon in vista with automatic logon enabled

I have vista x64 . I have some mapped network drives . They get connected when i enter the password at logon screen. Now i enabled automatic logon in vista and they do not connect anymore . I have to double click on them and enter the password manually .

Windows displays the message "Could not connect to all drives" at logon .

They used to connect automatically in xo with automatic logon enabled.

My logon password is the same as the administrator password with which i can connect to these drives .