Install AMS Centos6, libcap required

./installAMS

ERROR: A required package, libcap, was not found on your Linux x86_64 RedHat.

       Please install required package and run Adobe Media Server installer again.

[root@ip-10-254-24-40 AMS_5_0_1_r1076]# yum install libcap

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

* base: mirror.trouble-free.net

* epel: mirror.pnl.gov

* extras: mirrors.sonic.net

* updates: mirror.5ninesolutions.com

Setting up Install Process

Package libcap-2.16-5.5.el6.x86_64 already installed and latest version

Nothing to do

Its already installed, Installer broken? This is:

cat /proc/version

Linux version 2.6.32-358.0.1.el6.x86_64 (mockbuild@c6b10.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Wed Feb 27 06:06:45 UTC 2013

I have contacts at Adobe but they take a very long time to respond.