Many thanks for that – I was having the same problem, and its now solved.
However I’m a bit mystified as to why I would have that problem all of a sudden, I had a similar issue with trying to change my Scratch Disk back to my internal hard-drive, (after using an external one) it told me I didn’t have permission to write the disk, and I had to change the permissions of my user, and I’m the admin.
I’ve previously used it as the scratch disk with no permissions changing so I’m just curious if anyone know why this would happen all of a sudden?
Many thanks,
Danielle