can't boot on mac os x anymore nor use mac os x dvd

[geolab]

Hi. I have a big problem with my imac after installing fedora 10

 

this is what i did

- installed mac os x on a new hard disk

- everything ok. I installed all the updates- reboot

- installed refit - reboot on mac os x

- used boot camp to create a fat32 partition. asked me for a media insertion and put the dvd fedora 10 386 inside

- reboot

- fedora installation ok

sda1 efi partition (ssen under linux as fat32

sda2 macosx partition

sda3 root ext3 (grub is in sda3)

sda4 swap

sda5 home

 

My Problem

- after fedora installation I cannot boot on mac os x anymore

- I tried the mac osx installation dvd holding c button but nothing happens- only fedora

- I tried the option key at start up but no refit only fedora

can you help me to have a dual booting system?

thanks