You need to take ownership of the folder
Are you using Windows 7 this was a big problem. Half the time the permissions were screwed up
Applies To: Windows 7, Windows Server 2008 R2
The owner of the object controls how permissions are set on the object and to whom permissions are granted.
The Take Ownership permission on an object or the Restore files and directories user right are the minimum requirements to complete this procedure. Review the details in "Additional considerations" in this topic.
To take ownership of a file or folder
Open Windows Explorer, and then locate the file or folder you want to take ownership of.
Right-click the file or folder, click Properties, and then click the Security tab.
Click Advanced, and then click the Owner tab.
Click Edit, and then do one of the following:
To change the owner to a user or group that is not listed, click Other users and groups and, in Enter the object name to select (examples), type the name of the user or group, and then click OK.
To change the owner to a user or group that is listed, in the Change owner to box, click the new owner.
(Optional) To change the owner of all subcontainers and objects within the tree, select the Replace owner on subcontainers and objects check box.
If you dont have windows 7 here
https://technet.microsoft.com/en-us/magazine/ff404240.aspx
It happens so often when modding I created a right clock take ownership button
Thats here if you want
http://www.howtogeek.com/howto/windows-vista/add-take-ownership-to-explorer-right-click-menu-in-vista/