If it's still not working, Make sure your OSX partition (af) is not UNDER!!!!!!!!!!!!!!!!!!! an extended partition. It also have to be a PRIMARY Partition, not a Logical. Ex.:


Good:

-hda1, primary, boot, ntfs, etc. (windows partition)

-hda2, primary, af, etc.

-hda3, extended...

-hda4, logical, ntfs, etc.


bad:

-hda1, primary, boot, ntfs, etc. (windows partition)

-hda2, extended...

-hda3, primary, af, etc.

-hda4, logical, ntfs, etc.