"You don't need to create it yourself, it is automatically created when the automounter runs."
That is the problem, not created and therefore cannot mount there.
Interestingly, in a PURE2 system, this happens without error.Also mount windows shares immediately and use curftpfs (in fstab) to mount the remote FTP server automatically.However, Openpli is not. Only manual, in terminal can mount.Openatv is the same.So not the windows sharing is faulty.
Have you looked to see if the appropriate drivers are actually downloaded?? In OpenATV, its likely because of the desire to support older boxes that NFS and other file access methods need to be installed, they are not all installed by default.