[ovirt-users] Unable to connect to console in user portal

Hi, I have created two VMs on a node. Then I created a user and gave permission to the user for both as UserRole from the web console. Now when I login as the user to the user portal, I can see both the VMs. But when I click connect or double-click on a particular VM, I get an error message "Error while executing action VmLogon: Internal Engine Error". The ovirt engine and node version is 4.0. Please help Thank You Shalabh Goel