diff --git a/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingCard.java b/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingCard.java
index fad4164..d4e2908 100644
--- a/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingCard.java
+++ b/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingCard.java
@@ -17,7 +17,7 @@ public class ColumnMappingCard extends WizardCard {
 		this.unionSession = unionSession;
 		thisCard = this;
 
-		columnMappingPanel = new ColumnMappingPanel(thisCard,unionSession,res);
+		columnMappingPanel = new ColumnMappingPanel(thisCard,res);
 		
 		/*
 		columnMappingPanel
diff --git a/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingPanel.java b/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingPanel.java
index b2bcffa..c93d8c0 100644
--- a/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingPanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/unionwizardwidget/client/ColumnMappingPanel.java
@@ -5,42 +5,35 @@ import java.util.ArrayList;
 import org.gcube.portlets.user.td.gwtservice.client.rpc.TDGWTServiceAsync;
 import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTSessionExpiredException;
 import org.gcube.portlets.user.td.gwtservice.shared.tr.ColumnData;
-import org.gcube.portlets.user.td.gwtservice.shared.tr.TabResource;
 import org.gcube.portlets.user.td.unionwizardwidget.client.utils.UtilsGXT3;
 import org.gcube.portlets.user.td.widgetcommonevent.client.event.SessionExpiredEvent;
 import org.gcube.portlets.user.td.widgetcommonevent.client.type.SessionExpiredType;
 import org.gcube.portlets.user.td.widgetcommonevent.shared.TRId;
-import org.gcube.portlets.user.td.wizardwidget.client.WizardCard;
 import org.gcube.portlets.user.td.wizardwidget.client.dataresource.ResourceBundle;
 
 import com.allen_sauer.gwt.log.client.Log;
 import com.google.gwt.user.client.rpc.AsyncCallback;
-import com.sencha.gxt.cell.core.client.ButtonCell.IconAlign;
 import com.sencha.gxt.core.client.dom.ScrollSupport.ScrollMode;
 import com.sencha.gxt.core.client.util.Margins;
 import com.sencha.gxt.widget.core.client.ContentPanel;
 import com.sencha.gxt.widget.core.client.Resizable;
 import com.sencha.gxt.widget.core.client.Resizable.Dir;
-import com.sencha.gxt.widget.core.client.button.TextButton;
-import com.sencha.gxt.widget.core.client.container.HBoxLayoutContainer;
 import com.sencha.gxt.widget.core.client.container.SimpleContainer;
 import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer;
-import com.sencha.gxt.widget.core.client.container.BoxLayoutContainer.BoxLayoutData;
-import com.sencha.gxt.widget.core.client.container.BoxLayoutContainer.BoxLayoutPack;
-import com.sencha.gxt.widget.core.client.container.HBoxLayoutContainer.HBoxLayoutAlign;
 import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData;
-import com.sencha.gxt.widget.core.client.event.SelectEvent;
-import com.sencha.gxt.widget.core.client.event.SelectEvent.SelectHandler;
 import com.sencha.gxt.widget.core.client.form.FieldLabel;
 
 public class ColumnMappingPanel extends ContentPanel {
 
+	
 	protected ResourceBundle res;
-	private ColumnMappingCard parent;
-
-	public ColumnMappingPanel(ColumnMappingCard parent,ResourceBundle res) {
+	protected ColumnMappingCard parent;
+	protected VerticalLayoutContainer vert;
+	
+	public ColumnMappingPanel(ColumnMappingCard parent, ResourceBundle res) {
 		this.res = res;
 		this.parent = parent;
+	
 		Log.debug("ColumnMappingPanel");
 		init();
 		retrieveColumns();
@@ -53,19 +46,17 @@ public class ColumnMappingPanel extends ContentPanel {
 	}
 
 	protected void create() {
-		/*
-		itemIdSourceValueArg = "SourceArg" + selectedColumn.getName();
-		itemIdTargetValueArg = "TargetArg" + selectedColumn.getName();
+		
+		//itemIdSourceValueArg = "SourceArg" + selectedColumn.getName();
+		//itemIdTargetValueArg = "TargetArg" + selectedColumn.getName();
 
 		SimpleContainer container = new SimpleContainer();
-		container.setHeight(CONTAINERHEIGHT);
-		container.setWidth(CONTAINERWIDTH);
-
+		
 		vert = new VerticalLayoutContainer();
 		vert.setScrollMode(ScrollMode.AUTO);
 		vert.setAdjustForScroll(true);
 
-		setColumnMappingData();
+		//setColumnMappingData();
 
 		container.add(vert);
 		container.forceLayout();
@@ -79,7 +70,7 @@ public class ColumnMappingPanel extends ContentPanel {
 
 		add(vPanel);
 		forceLayout();
-		*/
+		
 	}
 
 	private void retrieveColumns() {