Twonky Sharing configuration issue

Hi,

I have a the following configuration:

Model: ReadyNAS Duo [X-RAID]
Firmware: RAIDiator 4.1.13
Storage: 2 x 1TB drives mirrored

Twonky: Version 6.0.34

Shared File Structure:

\\NAS\MyMedia
\\NAS\Media (set-up by Twonky)
\\NAS\twonkymedia (set-up by Twonky)

All my media is is the '\\NAS\MyMedia' directory so when I go to the 'Twonky Server Browser page -> Video -> By Folder' I only see one file which is currently located in '\\NAS\media\twonkymedia\videos\TwonkyMedia\uploaded videos'

As I have a lot of media I would prefer Twonky to be serving from '\\NAS\MyMedia' instead but for the life of me can't work out how to do it. I assume it is in the Basic Setup -> Sharing -> Content Locations section but don't know what path to add. The Browse button just shows /.

I did try copying (via Windows Explorer) from the "\\NAS\MyMedia" folder to the "\\NAS\media\twonkymedia\videos\TwonkyMedia\uploaded videos" folder but get a permissions issue.

I would appreciate any help. Thanks :-)