I can't live migrate the vm's in my cluster:

012-04-17 04:06:39,728 INFO  [org.ovirt.engine.core.bll.MigrateVmCommand] (pool-5-thread-48) Running command: MigrateVmCommand internal: false. Entities affected :  ID: ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a Type: VM
2012-04-17 04:06:39,743 INFO  [org.ovirt.engine.core.vdsbroker.MigrateVDSCommand] (pool-5-thread-48) START, MigrateVDSCommand(vdsId = f33ffc14-87ba-11e1-b610-e3aeca1e8008, vmId=ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a, srcHost=10.23.30.130, dstVdsId=b4d329b4-87b6-11e1-ac0a-b70ec8cc50f0, dstHost=10.23.30.110:54321, migrationMethod=ONLINE), log id: 7c7201be
2012-04-17 04:06:39,748 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand] (pool-5-thread-48) VdsBroker::migrate::Entered (vm_guid=ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a, srcHost=10.23.30.130, dstHost=10.23.30.110:54321,  method=online
2012-04-17 04:06:39,749 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand] (pool-5-thread-48) START, MigrateBrokerVDSCommand(vdsId = f33ffc14-87ba-11e1-b610-e3aeca1e8008, vmId=ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a, srcHost=10.23.30.130, dstVdsId=b4d329b4-87b6-11e1-ac0a-b70ec8cc50f0, dstHost=10.23.30.110:54321, migrationMethod=ONLINE), log id: 3c40c2de
2012-04-17 04:06:39,834 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand] (pool-5-thread-48) FINISH, MigrateBrokerVDSCommand, log id: 3c40c2de
2012-04-17 04:06:39,840 INFO  [org.ovirt.engine.core.vdsbroker.MigrateVDSCommand] (pool-5-thread-48) FINISH, MigrateVDSCommand, return: MigratingFrom, log id: 7c7201be
2012-04-17 04:06:42,166 INFO  [org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo] (QuartzScheduler_Worker-18) vds::refreshVmList vm id ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a is migrating to vds rhevh1.<domain> ignoring it in the refresh till migration is done
[...]
2012-04-17 04:07:33,852 INFO  [org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo] (QuartzScheduler_Worker-34) vds::refreshVmList vm id ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a status = Paused on vds rhevh1.<domain> ignoring it in the refresh till migration is done
2012-04-17 04:07:37,407 ERROR [org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo] (QuartzScheduler_Worker-71) Rerun vm ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a. Called from vds rhevh2.<domain>
2012-04-17 04:07:37,414 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateStatusVDSCommand] (pool-5-thread-47) START, MigrateStatusVDSCommand(vdsId = f33ffc14-87ba-11e1-b610-e3aeca1e8008, vmId=ce9bb531-4d2a-4f5e-9935-3c8a4f5db94a), log id: 8dfce1b
2012-04-17 04:07:37,496 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-47) Failed in MigrateStatusVDS method
2012-04-17 04:07:37,497 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-47) Error code createErr and error message VDSGenericException: VDSErrorException: Failed to MigrateStatusVDS, error = Error creating the requested virtual machine
2012-04-17 04:07:37,497 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-47) Command org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateStatusVDSCommand return value 
 Class Name: org.ovirt.engine.core.vdsbroker.vdsbroker.StatusOnlyReturnForXmlRpc
mStatus                       Class Name: org.ovirt.engine.core.vdsbroker.vdsbroker.StatusForXmlRpc
mCode                         9
mMessage                      Error creating the requested virtual machine


2012-04-17 04:07:37,497 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-47) Vds: rhevh2.<domain>
2012-04-17 04:07:37,497 ERROR [org.ovirt.engine.core.vdsbroker.VDSCommandBase] (pool-5-thread-47) Command MigrateStatusVDS execution failed. Exception: VDSErrorException: VDSGenericException: VDSErrorException: Failed to MigrateStatusVDS, error = Error creating the requested virtual machine
2012-04-17 04:07:37,497 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateStatusVDSCommand] (pool-5-thread-47) FINISH, MigrateStatusVDSCommand, log id: 8dfce1b
2012-04-17 04:07:37,528 WARN  [org.ovirt.engine.core.bll.MigrateVmCommand] (pool-5-thread-47) CanDoAction of action MigrateVm failed. Reasons:ACTION_TYPE_FAILED_VDS_VM_CLUSTER,VAR__ACTION__MIGRATE,VAR__TYPE__VM


There is no problem regarding storage or anything like that. If I shut down the vm I can start it on the other host without any problems whatsoever.
Do I need to do something to make live migration work? Trying to dig in the logs on the hypervisors, but there's so much stuff being logged there...