[CentOS] Using C7 as host to C5 guest

Hi all,

I am using C7 as a host to a C5 image. This used to boot. I tried today to
boot up the C5 image and it get stuck now on the boot screen.  Any thoughts
on why ?

It stuck on the screen that shows
root (hd0,0)
Filesystem type ext2fs partition type 0x83
kernel /boot/vmlinuz-2.16.18-402.el5

Then nothing... I know C5 is way out of date - but have a couple places
still using it.

Thoughts on getting this to boot up ?

Jerry