All good, have it working now, had to disable the firewall in the router.
Another problem, everytime I add a folder for a ftp user to access on the DNS-323 it never shows up, I went into the icon properties on the drive in Network and it says \\DNS-323\Volume_1, but in the computer icon it shows a folder and it's properties are \\192.168.1.10\Volume_1 and when I transfer files to this folder it shows up for the ftp user.
Do I need to copy over files and folders to this icon for it to work? why can I not just have everything in one location? i.e the DNS-323 drive?