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
{
			errorMessageLine.setText( errorMessage );
			errorMessageLine.setImage( ERROR_ICON );
		}
		else
		{
			errorMessageLine.setText( "" ); 
			errorMessageLine.setImage( null );
		}
		if ( promptMessageLine != null && !promptMessageLine.isDisposed( ) )
		{
			if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( getSelectedDataType( ) ) )
			{
				promptMessageLine.setText( LABEL_DATETIME_PROMPT );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_DATE.equals( getSelectedDataType( ) ) )
			{
				promptMessageLine.setText( LABEL_DATE_PROMPT );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_TIME.equals( getSelectedDataType( ) ) )
			{
				promptMessageLine.setText( LABEL_TIME_PROMPT );
			}
			else
			{
				promptMessageLine.setText( "" ); 
			}
		}
		updateButtons( );
	}