Windows 7: A member of Administrators group can´t use the groups permissions

Hi all,

I am experiencing a strange problem. I have a user called mahria_98765 that is member of Administrators group. I´ve granted Full Control permission for Administrators to some executable files.

When I log on as mahria_98765, this user can´t execute the file. But if I add the user mahria_98765 itself to the ACL with permission Full Control to the same file, I can execute the file. It seems the permissions granted to the group for some strange reason are not beeing granted to a member of the group.

The file ACL has two entries:

System - Full Control
Administrators - Full Control



Any help would be appreciated.