I am sure that there is a problem with the partitions on my disk. There are four partitions:
hda1) Vfat
hda5) Vfat extended
hda3) Ext2 or ext3 (i can not remebre which one)
hda4) Swap

But the knoppix does not detect me the vfat extended. I can mount the others partitions without any problem. The gtparted detects the hda5 partitions, but /proc/partitions don't. I don't know how, once (and only once) I was able to mount hda5 (which usually it does not appears in fstab).

There is a strange thing: the vfat partitions are hda1 or hda5 then, why does the knoppix (when loading the installed one), tries to open hda3 as a vfat? [first error]

Thanks