Error when starting the Dell Equallogic SAN Headquarters

Hello, every time I started the Dell Equallogic SAN Headquarters, I got the Message:

Das Stammelement ist nicht vorhanden.
System.Xml
   bei System.Xml.XmlTextReaderImpl.Throw(Exception e)
   bei System.Xml.XmlTextReaderImpl.ParseDocumentContent()
   bei System.Xml.XmlReader.MoveToContent()
   bei Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderServiceDescriptorCollection.Read4_ArrayOfServiceDescriptor()

How can I fix this, so the Application runs well?

Best wishes,

Ralf Köhnsen