gparted dont recognize my partition table

this is my partition table:

ubuntu@ubuntu:~$ sudo disktype /dev/sda

--- /dev/sda
Block device, size 111.8 GiB (120034123776 bytes)
DOS partition map
Partition 1: 9.767 GiB (10487199744 bytes, 20482812 sectors from 63, bootable)
  Type 0x07 (HPFS/NTFS)
  NTFS file system
    Volume size 9.767 GiB (10487199232 bytes, 20482811 sectors)
Partition 2: 102.0 GiB (109544279040 bytes, 213953670 sectors from 20482875)
  Type 0x05 (Extended)
  Partition 5: 14.65 GiB (15726670848 bytes, 30716154 sectors from 20482876+125)
    Type 0x83 (Linux)
    ReiserFS file system (new 3.6 format, standard journal, starts at 64 KiB)
      UUID E001A9BE-0D08-441F-B8AD-C8FE510DA049 (DCE, v4)
      Volume size 14.65 GiB (15726608384 bytes, 3839504 blocks of 4 KiB)
  Partition 6: 1.026 GiB (1102155264 bytes, 2152647 sectors from 81915435+63)
    Type 0x82 (Linux swap / Solaris)
    Linux swap, version 2, subversion 1, 4 KiB pages, little-endian
      Swap size 1.026 GiB (1102143488 bytes, 269078 pages of 4 KiB)
  Partition 7: 71.70 GiB (76988588544 bytes, 150368337 sectors from 84068145+63)
    Type 0x83 (Linux)
    ReiserFS file system (new 3.6 format, standard journal, starts at 64 KiB)
      UUID 44769020-C149-407E-A035-EC5F330DE01B (DCE, v4)
      Volume size 71.70 GiB (76988547072 bytes, 18796032 blocks of 4 KiB)
Partition 3: 14.65 GiB (15726703104 bytes, 30716217 sectors from 51199218)
  Type 0x83 (Linux)
  ReiserFS file system (new 3.6 format, standard journal, starts at 64 KiB)
    UUID 4CC0D9BA-EA3C-48F1-AF1F-6B52B31AC810 (DCE, v4)
    Volume size 14.65 GiB (15726673920 bytes, 3839520 blocks of 4 Kib

yesterday i installed winxp, in the first partition, before it is reiserfs, now ntfs,
now i'm trying to install ubuntu, gparted say that all space is not assigned, but with the utility disktype I see the partitions are ok.

Anyway, how can i install ubuntu, i tried dapper, edgy, and feisty beta, gprted say the same...

(could the alternative cd help me?)

Thanks for all

Byez