Exceptiong installingUML plugin again.

I thought this was gone for good but it is back again. Tried installing it and ended up with the following exception. The same exception occurs after trying to uninstall and reinstall again.

Running NB6 on Vista.

Warning - could not install some modules:
        UML Project - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Design Center - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Properties - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Doc Control - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Java 5.0 Parser - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML DOORS Requirements - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML XML Requirements - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Palette - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Code Generation - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML IDE Integration - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Drawing Area - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Web Report - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Samples - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML - The module named org.netbeans.modules.uml/1 was needed and not found.
        UML Requirements - The module named org.netbeans.modules.uml/1 was needed and not found.
        10 further modules could not be installed due to the above problems.