[Users] "unable to connect after upgrade 3.3.3 to 3.4.0"

Hello, I'm trying oVirt allinone version 3.3.3 and after the upgrade to 3.4.0 the virtual machines do not start using spice client (linux or windows). I'm using centos 6.5. The message displayed is "unable to connect to server console.vv graphics." Can someone help me? thank you NG