Question: Using CCleaner to delete files off Network Drive (NAS)

I've searched the Piriform forums and cannot seem to find a solution to my issue.

I've tried using CCleaner to clean out specific files/folders on my Network Attached Storage (NAS); I've even specified the files & folder in the include section. However, when I hit "run cleaner" CCleaner does not delete the filed I specified on the NAS. Can someone shine some light on using CCleaner to delete files from a Network Drive? Much appreciated.