diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
index 9ab6ec4..89f7eee 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
@@ -280,6 +280,8 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 			throws TDGWTServiceException {
 		try {
 			HttpSession session = this.getThreadLocalRequest().getSession();
+			SessionUtil.getAslSession(session);
+			
 			if (tabResource == null) {
 				logger.error("Error setting TabResource: null");
 				throw new TDGWTServiceException(
@@ -289,10 +291,9 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 			SessionUtil.setTabResource(session, tabResource);
 			SessionUtil.setTRId(session, tabResource.getTrId());
 			return;
-
+			
 		} catch (TDGWTSessionExpiredException e) {
 			throw e;
-
 		} catch (Throwable e) {
 			logger.error(
 					"Error setting TabResource parameter: "
@@ -312,7 +313,8 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 	public TRId getCurrentTRId() throws TDGWTServiceException {
 		try {
 			HttpSession session = this.getThreadLocalRequest().getSession();
-
+			SessionUtil.getAslSession(session);
+			
 			TabResource currentTR = SessionUtil.getTabResource(session);
 			logger.debug("getCurrentTRId()");
 			if (currentTR == null) {
@@ -1460,6 +1462,7 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 	public void startTDOpen(TDOpenSession s) throws TDGWTServiceException {
 		try {
 			HttpSession session = this.getThreadLocalRequest().getSession();
+			SessionUtil.getAslSession(session);
 			SessionUtil.setTDOpenSession(session, s);
 			return;