Andy,
I found this when I searched…hope it helps.
To resolve this issue, you must set Full Control permissions on the Land Projects folder. Follow these steps:
1. Log in as Administrator and start Windows Explorer.
2. Right-click the Land Projects 2005 folder.
3. Click the Security tab and select the Users group.
4. Select Full Control Permissions. Click Apply.
5. Click Advanced.
6. In the Advanced Security Settings dialog box, verify that the Users group has an entry for Full Control.
7. Select Replace Permissions on All Child Objects.
8. Click OK.
9. Click Yes when prompted to reset the security permissions on all child objects.