diff --git a/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java b/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java
index d46fc07..2274553 100644
--- a/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/joinvre/server/JoinServiceImpl.java
@@ -44,6 +44,7 @@ import com.liferay.portal.kernel.exception.PortalException;
 import com.liferay.portal.kernel.exception.SystemException;
 import com.liferay.portal.kernel.log.Log;
 import com.liferay.portal.kernel.log.LogFactoryUtil;
+import com.liferay.portal.kernel.util.StringBundler;
 import com.liferay.portal.model.Group;
 import com.liferay.portal.model.VirtualHost;
 import com.liferay.portal.security.auth.PrincipalThreadLocal;
@@ -55,6 +56,7 @@ import com.liferay.portal.service.LayoutSetLocalServiceUtil;
 import com.liferay.portal.service.UserLocalServiceUtil;
 import com.liferay.portal.service.VirtualHostLocalServiceUtil;
 import com.liferay.portal.util.PortalUtil;
+import com.liferay.portal.webserver.WebServerServletTokenUtil;
 
 /**
  * @author Massimiliano Assante, ISTI-CNR - massimiliano.assante@isti.cnr.it
@@ -157,6 +159,7 @@ public class JoinServiceImpl extends RemoteServiceServlet implements JoinService
 		_log.trace("RETURNING VRECustomAttributes:\n" + toReturn.toString());
 		return toReturn;
 	}
+
 	/**
 	 * 
 	 * @return the Virtual groups with their VREs in the order estabilished in the LR Control Panel
@@ -191,7 +194,7 @@ public class JoinServiceImpl extends RemoteServiceServlet implements JoinService
 			GCubeUser currUser = new LiferayUserManager().getUserByUsername(session.getUsername());
 			currUserGroups = gm.listGroupsByUser(currUser.getUserId());
 		}
-		long nowInMillis = new Date().getTime();
+		
 		//for each root sub organizations (VO)
 		for (GCubeGroup vOrg : rootGroupVO.getChildren()) {
 			for (GCubeGroup vreOrganization : vOrg.getChildren()) {
@@ -200,7 +203,7 @@ public class JoinServiceImpl extends RemoteServiceServlet implements JoinService
 				String vreDescription = vreOrganization.getDescription();
 
 				long logoId = vreOrganization.getLogoId();
-				String vreLogoURL = "/image/layout_set_logo?img_id="+ logoId+"&t="+nowInMillis;;
+				String vreLogoURL = gm.getGroupLogoURL(logoId);
 				String groupName = gm.getInfrastructureScope(vreOrganization.getGroupId());
 				String friendlyURL =  GCubePortalConstants.PREFIX_GROUP_URL+vreOrganization.getFriendlyURL();
 
@@ -318,9 +321,9 @@ public class JoinServiceImpl extends RemoteServiceServlet implements JoinService
 			String vreName = selectedVRE.getGroupName();
 			String vreDescription = selectedVRE.getDescription();
 
-			long nowInMillis = new Date().getTime();
+			
 			long logoId = selectedVRE.getLogoId();
-			String vreLogoURL = "/image/layout_set_logo?img_id="+ logoId+"&t="+nowInMillis;;
+			String vreLogoURL = gm.getGroupLogoURL(logoId);
 			String infraScope = gm.getInfrastructureScope(selectedVRE.getGroupId());
 			String friendlyURL =  GCubePortalConstants.PREFIX_GROUP_URL+selectedVRE.getFriendlyURL();
 			VRECustomAttributes attrs = getVRECustomAttr(selectedVRE);