Bug 118644 Hint for Date Time Parameters
The hint you give for date time parameters (Please enter date ... pattern: MM/DD/YYYY ....) is only true if the date is unformatted. If you apply a format, you must enter it according to it. So it's quite confusing!
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
valueTable.setColumnProperties( columns );
		valueTable.setContentProvider( contentProvider );
		valueTable.setLabelProvider( labelProvider );
		valueTable.setCellModifier( cellModifier );
		valueTable.setInput( choiceList );
		valueTable.addSelectionChangedListener( new ISelectionChangedListener( ) {
			public void selectionChanged( SelectionChangedEvent event )
			{
				updateTableButtons( );
			}
		} );
		Composite buttonBar = new Composite( tableArea, SWT.NONE );
		buttonBar.setLayout( UIUtil.createGridLayoutWithoutMargin( 4, false ) );
		buttonBar.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		importValue = new Button( buttonBar, SWT.PUSH );
		importValue.setText( BUTTON_LABEL_IMPORT );
		setButtonLayoutData( importValue );
		
		importValue.setEnabled( !inputParameter.getModuleHandle( )
				.getAllDataSets( )
				.isEmpty( ) );
		importValue.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				String type = getSelectedDataType( );
				ImportValueDialog dialog = new ImportValueDialog( type );
				if ( dialog.open( ) == OK )
				{
					String[] importValues = (String[]) dialog.getResult( );
					for ( int i = 0; i < importValues.length; i++ )