upgrade to fedora 16, i cant boot
 

hi all,
i've got a dual-boot pc using linux (fedora 14) and windows (vista). Today i tried to upgrade fedora from 14 to 16. I did via preupgrate. And now i cant boot my pc from linux. An error 15 appears. any solution to that problem?

i cant figure out from where i have to start :(
i am new in linux.i tried the command find grub/grub.conf and the result was hd(0,2)
so , i did root(hd0,2) and kernel /boot/upgrade/vmlinuz and as a result i took error 15 file not found :( what i am doing wrong??

This is a known issue, Fedora 16 now uses grub2 but older versions of preupgrade failed to convert the boot config from grub->grub2, try fixing by booting into rescue mode from the dvd and running: