Sorry it took so long to get back to you.
By the sounds of it you have a compiled binary executable for ntfs-3g.
What command are you using specifically and what if any errors are you receiving when attempting to mount? Also, what device node in /dev are you attempting to mount and are you certain that that node corresponds to the NTFS drive you are attempting to mount?
mount.ntfs-3g /dev/sdc1 /mnt/test works on my CentOS5 x64 system without issues. I have had major issues with NTFS-3g on previous distributions of CentOS/RHEL in the past but it seems to work flawlessly in my RHEL5 x64 box.
Sorry for bothering you so much, I just found it was my I/O devices problems. All about my hardware. I used mount -t ntfs-3g /dev/sdc1 /mnt/usb, it worked after fixing this problem. THANK YOU!!!!
I have 4 usb ports on my server, I tried two of them, but sometimes it said error -77 or error -110, or "unknown system ntfs" when I mount my external hard drive, so I tried another one, it did work. Maybe a little bit dumb, but it is the simplest way. Then my tutor check this server, he told me there are some probs on I/O devices, it was too old to work well......................
Hope this would help