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
delete = new Button( buttonBar, SWT.PUSH );
		delete.setText( BUTTON_LABEL_DELETE );
		setButtonLayoutData( delete );
		delete.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				deleteRow( );
			}
		} );
		createPromptLine( tableArea );
		updateTableButtons( );
	}
	private void switchToText( )
	{
		createDefaultEditor( );
		createLabel( valueArea, null );
		createPromptLine( valueArea );
	}
	private void switchToStatic( )
	{
		changeControlType( );
		listLimit.setEditable( false );
	}
	private void switchToDynamic( )
	{
		Composite composite = new Composite( valueArea, SWT.NONE );
		GridData gd = new GridData( GridData.FILL_HORIZONTAL );
		gd.horizontalSpan = 2;
		composite.setLayoutData( gd );
		composite.setLayout( UIUtil.createGridLayoutWithoutMargin( 3, false ) );