i had the same problem,i saw the partition and could access the HDD
i called yesterday with Asus germany.
they told me that the harddisk needed at least one FAT32 partition.
and that the first partition always a FAT32 partition must be.
i made a FAT32 and 1 NTFS partition.
but the strange thing was,that i couldn't write anything on the NTFS partition.
even i couldn't make a new folder in the share node list.
so i changed the NTFS partition into 2 FAT32 partitions
(2 partitions because i thought that the sice was to big for 1 partition)
,and it worked fine for me .the only problem is that there is a file sice limit with FAT32.
i hope this is helpfull for you .
sorry for my english(i'm dutch)