Bug 135465 [smoke]An error occurred when new a casading Parameter
Description: An error occurred when new a casading Parameter Step to reproduce: 1.new a sample db data source and data set 2.New a cascading parameter group, named "gp1", 3.select the data set, then create two cascading parameters, one is row["customernumber"], named p1; the other is row["customername"] Actual result; error message occurred repeatly
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
{
	private static final String LABEL_PROMPT_TEXT = Messages.getString( "CascadingParametersDialog.label.promptText" ); 
	private static final String LABEL_SELECT_DISPLAY_COLUMN = Messages.getString( "CascadingParametersDialog.label.select.displayColumn" ); 
	private static final String LABEL_VALUES = Messages.getString( "CascadingParametersDialog.label.values" ); 
	private static final String LABEL_LIST_LIMIT = Messages.getString( "CascadingParametersDialog.label.listLimit" ); 
	private static final String LABEL_GROUP_GENERAL = Messages.getString( "CascadingParametersDialog.label.group.general" ); 
	private static final String LABEL_CASCADING_PARAMETER_NAME = Messages.getString( "CascadingParametersDialog.label.cascadingParam.name" ); 
	private static final String LABEL_DATA_SETS = Messages.getString( "CascadingParametersDialog.label.dataSets" ); 
	private static final String LABEL_BUTTON_CREATE_NEW_DATASET = Messages.getString( "CascadingParametersDialog.label.button.createNew.dataset" ); 
	private static final String LABEL_PARAMETERS = Messages.getString( "CascadingParametersDialog.label.parameters" ); 
	private static final String LABEL_GROUP_PROPERTIES = Messages.getString( "CascadingParametersDialog.label.group.properties" ); 
	private static final String LABEL_PARAM_NAME = Messages.getString( "CascadingParametersDialog.label.param.name" ); 
	private static final String LABEL_DATA_TYPE = Messages.getString( "CascadingParametersDialog.label.dataType" ); 
	private static final String LABEL_DISPLAY_TYPE = Messages.getString( "CascadingParametersDialog.label.displayType" );