Some corrections about my problem:
When I try to install the domU using virt-manager, it hangs when I click the first next button after anaconda installer started. The button stays pressed an nothing happens.
When I install without kickstart it hangs in the "next" button, independent of using virt-manager or virt-install.
When I try to install the domU using virt-install, it gives a black screen after starting anaconda installer.
The black screen happens when I use kickstart.
Regards,
Augusto