mount_ntfs does not mount

Hi All,
I have following problem on my system 5.2-RELEASE-p2
# mount_ntfs /dev/ad4s4 /mnt/share1
mount_ntfs: /dev/ad4s4: No such file or directory
Exit 71

but slice ad4s4 exist:
pilkis_at_pilkishome:/usr/src# ls /dev/ad4*
/dev/ad4        /dev/ad4s2      /dev/ad4s3a     /dev/ad4s3c     /dev/ad4s3e     /dev/ad4s4
/dev/ad4s1      /dev/ad4s3      /dev/ad4s3b     /dev/ad4s3d     /dev/ad4s3f
and I am sure, what it's ntfs partition

pilkis_at_pilkishome:/usr/src# fdisk /dev/ad4
******* Working on device /dev/ad4 *******
parameters extracted from in-core disklabel are:
cylinders=498625 heads=16 sectors/track=63 (1008 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=498625 heads=16 sectors/track=63 (1008 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 7 (0x07),(OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX)
    start 63, size 12578832 (6142 Meg), flag 80 (active)
        beg: cyl 0/ head 1/ sector 1;
        end: cyl 782/ head 254/ sector 63
The data for partition 2 is:
sysid 7 (0x07),(OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX)
    start 12578895, size 12578895 (6142 Meg), flag 0
        beg: cyl 783/ head 0/ sector 1;
        end: cyl 1023/ head 254/ sector 63
The data for partition 3 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 25157790, size 12578895 (6142 Meg), flag 0
        beg: cyl 1023/ head 0/ sector 1;
        end: cyl 1023/ head 254/ sector 63
The data for partition 4 is:
sysid 7 (0x07),(OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX)
    start 37736685, size 464872905 (226988 Meg), flag 0
        beg: cyl 1023/ head 0/ sector 1;
        end: cyl 1023/ head 254/ sector 63


as well I cannot mount any other ntfs partition...



any workaround or soliution ?