Thanks Dommy for your help,
I'm not sure if the FC3 is corrupted as well because when I boot it in emergency mode using FC3 1st disk, it recognizes the /root partition and all of its contents.
while logged in emergency mode, I tried this comman also:
dd if=/dev/hda2 of=/win/fedora/linux.bin bs=512 count=1
And then I replaced the old linux.bin file in Drive C with this new one and still no luck