A lot of event ID 717 and 722 - MSExchangeMonitoringCorrelation

What can I do to make these go away. They occur very often on my 2012 MS. Here are some details:

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Connection with the Operations Manager Root Management Server failed.

Error: System.InvalidCastException: [A]System.Collections.Generic.List`1[Microsoft.EnterpriseManagement.Monitoring.MonitoringAlertUpdateStatusIndigo] cannot be cast to [B]System.Collections.Generic.List`1[Microsoft.EnterpriseManagement.Monitoring.MonitoringAlertUpdateStatusIndigo]. Type A originates from 'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' in the context 'LoadNeither' at location 'C:\Windows\assembly\GAC_64\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll'. Type B originates from 'mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' in the context 'LoadNeither' at location 'C:\Windows\assembly\GAC_64\mscorlib\2.0.0.0__b77a5c561934e089\mscorlib.dll'.
   at Microsoft.EnterpriseManagement.Utilities.GetDeserializeObject[T](Byte[] serializedObject)
   at Microsoft.EnterpriseManagement.DataAbstractionLayer.InstanceSpaceOperations.UpdateAlerts(Byte[] alerts, String comments, Nullable`1 modifyingConnectorId)
   at Microsoft.EnterpriseManagement.Monitoring.MonitoringAlert.UpdateAlertsInternal[T](IList`1 alerts, String comments, Nullable`1 modifyingConnectorId, ManagementGroup managementGroup)
   at Microsoft.EnterpriseManagement.Monitoring.MonitoringAlert.UpdateInternal(String comments, Nullable`1 modifyingConnectorId)
   at Microsoft.EnterpriseManagement.Monitoring.MonitoringAlert.Update(String comments)
   at Microsoft.Exchange.Monitoring.CorrelationEngine.MomSdkProxy.ResolveEntityAlert(Entity entity, MonitoringAlert monAlert)
   at Microsoft.Exchange.Monitoring.CorrelationEngine.MomSdkProxy.ResolveEntityAlerts(Entity entity, String alertCriteriaString)
   at Microsoft.Exchange.Monitoring.CorrelationEngine.CorrelationEngine.CorrelateWithinEntity(Node entity)
   at Microsoft.Exchange.Monitoring.CorrelationEngine.CorrelationEngine.CorrelateBatchTask(Object batchData)

Number of occurrence: 1

Retrying in 30 seconds...

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Thanks in advance.
Rune Haugen
Norway