Bug 191685 [regression]Set default value doesn't work in Report Parameter[0705]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
if ( label.getText( ).equals( LABEL_VALUES ) )
		{
			gd.verticalAlignment = GridData.BEGINNING;
		}
		label.setLayoutData( gd );
	}
	private void addCheckBoxListener( final Button checkBox, final String key )
	{
		checkBox.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				checkBoxChange( checkBox, key );
			}
		} );
	}
	/**
	 * @param key
	 * @param checkBox
	 * 
	 */
	protected void checkBoxChange( Button checkBox, String key )
	{
		dirtyProperties.put( key, new Boolean( checkBox.getSelection( ) ) );
		if ( CHECKBOX_ISREQUIRED.equals( key ) )
		{
			if ( isStatic( ) )
			{
				makeUniqueAndValid( );
				refreshValueTable( );
			}