[SOLVED] multi boot Ubunto12.04,Ubunto1.04 in mac by using rEFIT

I'm trying to triple boot Ubuntu 12.04, Ubuntu 14.04 and mac OS. So I installed the two versions of Ubuntu in two partitions on my mac hard drive. When I reboot my system only the latest installed system will show up in the boot menu with the original mac OS. i.e only two system will boot not all the three of them.


Any idea how can I fix the Problem?

Thanks,
Flora