[news.eclipse.platform] Problem with Quick Fixes

[Frank Becker <Frank@xxxxxxxxxxxxxxx>]

Hi,

followed the instruction at http://wiki.eclipse.org/index.php/
FAQ_How_do_I_implement_Quick_Fixes_for_my_own_language%3F but no Quick 
Fix is shown.

Here is my Source:
file SironQuickFixer.java
package de.lrp.editor.sironeditor.siron;

import org.eclipse.core.resources.IMarker;

class SironQuickFixer implements IMarkerResolutionGenerator {
      public IMarkerResolution[] getResolutions(IMarker mk) {
            return new IMarkerResolution[] {
               new SironQuickFix("Fix #1 for " /*+problem*/), //$NON-
NLS-1$
               new SironQuickFix("Fix #2 for "/*+problem*/), //$NON-
NLS-1$
            };
      }
}

file SironQuickFix.java
package de.lrp.editor.sironeditor.siron;

import org.eclipse.core.resources.IMarker;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.IMarkerResolution;

public class SironQuickFix implements IMarkerResolution{
    String label;
    SironQuickFix(String label) {
       this.label = label;
    }
    public String getLabel() {
       return label;
    }
    public void run(IMarker marker) {
       MessageDialog.openInformation(null, "QuickFix Demo", //$NON-
NLS-1$
          "This quick-fix is not yet implemented"); //$NON-NLS-1$
    }
 }

file plugin.xml contains
   <extension
      id="myproblem"
      point="org.eclipse.core.resources.markers">
      <super type="org.eclipse.core.resources.problemmarker"/>
       <attribute name="myAttribute" />
      <persistent value="true" />
   </extension>
 
   <extension point="org.eclipse.ui.ide.markerResolution">
      <markerResolutionGenerator
        markerType="de.lrp.editor.siron.myproblem" 
         class="de.lrp.editor.sironeditor.siron.SironQuickFixer"/>
   </extension>

What did I miss?

Thanks

Frank