Can't turn on a new vm on rdm with an iso to build the os

Hey guys,

I am on ESX 4 build 261974.

If I try to build a vm on an RDM using an iso file of the OS the vm won't even turn on.  If I use the same iso file on a new vm that uses vmdk, it works fine.  I have tried this on two different clusters and been able to replicate the problem.  I downloaded the iso and found that it works perfectly in the two different clusters when used with a vmdk and on my workstation.  Has anyone else seen this?  I have a ticket open with vmware support   1583196201

Let me know, doesn't matter if it is linux or windows.

Matthew