I set up an old computer as a NAS/fileserver. It contains all my video files. These files are accessed by a separate HTPC hooked up to my TV (also running Windows 7). Everything was working great until today.
Most of the folders on the main hard drive are older. They were created before this latest PC build (and installation of Windows 7). The old folders I can access through the HTPC and edit as I need to.
Any new folder though, I cannot edit via the HTPC. I keep getting this error message: "You require permission from Dinosaur\d1 to make changes to this folder" (Dinosaur is the name of the fileserver; d1 is the main user on Dinosaur)
Attached is a screenshot of the Permissions of an older folder (on the left) and a newer folder (on the right). Any new folder I create has the same Permissions as the folder on the right and cannot be edited via the HTPC. The older folders can. I've tried adding "Authenticated Users" and "Users" to the new folder Permissions, but that didn't work.
What do my permissions need to be, and how can I set it so those are the default set when creating a new folder?

The old folder has permissions for the following users:
Authenticated Users
SYSTEM
Administrators
Users
The new folder has permissions for the following users:
SYSTEM
Home Users
d1
Administrators
WMPNetworkSvc
I set all the users permissions for the new folder to Full Control with no luck.
