I used fixparts and lost my backup parts.txt!

Question

I'm using xubuntu 12.10 live . While installing it didn't detect the rest of partitions, even Gparted didn't detect them . I used

Fixparts : www.rodsbooks.com/fixparts

in order to fix this . I made the backup parts.txt inside the hard disk. I made a mistake so when I write sudo fdisk -l in terminal it shows:

xubuntu@xubuntu:~$ sudo fdisk -l
fdisk: unable to seek on /dev/sda: Invalid argument

and even when I'm trying to boot my windows it shows me that everything is deleted . i can't access everything except the bios and the liveCD ...

Please