Problem resizing SATA disc partition with parted / qtparted

[duncang]

Knoppix 3.8.1 CD boots on my PC successfully and mounts my SATA drive correctly such that I can view and edit files on all the partitions.
However parted and qtparted fail to resize a FAT32 partition reporting the message "The information sector has the wrong signature (0)".

Any suggestions? PC has Asus A7V600-X motherboard with VIA 8237 SATA and single SATA drive attached. Output from parted:

Using /UNIONFS/dev/sda
Information: The operating system thinks the geometry on /UNIONFS/dev/sda is
9729/255/63.  Therefore, cylinder 1024 ends at 8032.499M.

(parted) print
Disk geometry for /UNIONFS/dev/sda: 0.000-76319.085 megabytes
Disk label type: msdos
Minor    Start       End     Type      Filesystem  Flags
1          0.031   2863.146  primary   fat32       boot
2       2863.147  76316.594  extended              lba
5       2863.178   5726.293  logical   fat32
6       5726.325  24803.481  logical   fat32
7      24803.512  43880.668  logical   fat32
8      43880.700  76316.594  logical   fat32

(parted) resize 7
Start?  [24803.5122]?
End?  [43880.6685]? 40000
Warning: The information sector has the wrong signature (0).  Select cancel for
now, and send in a bug report.  If you're desperate, it's probably safe to
ignore.

qtparted reports same error when attempting to resize /dev/sda partition 7

root@1[knoppix]# qtparted
Warning: Unable to open /UNIONFS/dev/hda read-write (Read-only file system).  /UNIONFS/dev/hda has been opened read-only.
Warning: The information sector has the wrong signature (a0d7472).  Select cancel for now, and send in a bug report.  If you're desperate, it's probably safeto ignore.
Warning: The information sector has the wrong signature (0).  Select cancel for now, and send in a bug report.  If you're desperate, it's probably safe to ignore.

fdisk reports:

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1         365     2931831    b  W95 FAT32
/dev/sda2             366        9729    75216330    f  W95 Ext'd (LBA)
/dev/sda5             366         730     2931831    b  W95 FAT32
/dev/sda6             731        3162    19535008+   b  W95 FAT32
/dev/sda7            3163        5594    19535008+   b  W95 FAT32
/dev/sda8            5595        9729    33214356    b  W95 FAT32

[duncang]

Resolved - with Knoppix 3.9 parted move/resize works fine with for my SATA drive.