Macbook pro will not boot into Mac OSX

[jwpoore]

When i got my MacBook Pro it would boot into Mac OSX fine. Now it wont even give me the option and will only let me boot into Windows which i have running through bootcamp. I have tried reinstalling MacOSX but my OSX installion DVD will not get recognised and i cannot boot off it either. I have tried using 2 other discs still with the same issue. The confusing thing is that the CD/DVD drive works fine and the MacOSx discs work fine in other macs as i have tried it in my brothers machine.

Any help appreciated.
Thanks

 

[MacDawg]

Do you hold the option key when you boot?
Just checking


Woof, Woof - Dawg

 

[jwpoore]

Yeah, When I hold option the only boot option which appears is "Windows". When I'm using windows, the Mac partition is recognised.