error on virtual manager

In red hat linux server 6
I start up virtual manager and I get below error prompt.

Package reuired for KVM usage
The following packages are not installed
qemu-kvm
These are required to create KVM guests locally.
Would you like to install them now .
I press yes but the package cannot located ...
So, I have install the qemu-kvn-0.12.1.2.113.el6_0.8.src.rpm already
I use command rpm -ivh XXX.rpm to install.
So, what I miss and please advice