achartengine.org JAR binding error

I made a Java Binding Project for the aChart jar file.

aChart gives a error on the Pan class with the Pan eventhandler. Therefore I added the following to the Metadata.xml:

<attr path="/api/package[@name='org.achartengine.tools']/class[@name='Pan']" name="managedName">Panning</attr>

After fixing that I get a new error:

Org.Achartengine.Chart.AbstractChart.cs(192,192): Error CS0308: The non-generic type 'System.Action' cannot be used with type arguments (CS0308) (aChartEngine)

Can someone help please?