Index: lams_tool_dimdim/src/java/org/lamsfoundation/lams/tool/dimdim/web/actions/LearningAction.java
===================================================================
diff -u -r718613f72e0fc64be2db39de3c6c3682852d815b -r17f365b6e67b7e64cbad79ec5000a309a3bd929d
--- lams_tool_dimdim/src/java/org/lamsfoundation/lams/tool/dimdim/web/actions/LearningAction.java	(.../LearningAction.java)	(revision 718613f72e0fc64be2db39de3c6c3682852d815b)
+++ lams_tool_dimdim/src/java/org/lamsfoundation/lams/tool/dimdim/web/actions/LearningAction.java	(.../LearningAction.java)	(revision 17f365b6e67b7e64cbad79ec5000a309a3bd929d)
@@ -30,6 +30,7 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.apache.commons.lang.StringUtils;
 import org.apache.log4j.Logger;
 import org.apache.struts.action.ActionForm;
 import org.apache.struts.action.ActionForward;
@@ -160,7 +161,7 @@
 	    } // otherwise, meeting has not been started in monitoring
 	}
 
-	boolean conferenceOpen = connectURL.isEmpty() ? false : true;
+	boolean conferenceOpen = StringUtils.isEmpty(connectURL) ? false : true;
 	request.setAttribute(Constants.ATTR_CONFERENCE_OPEN, conferenceOpen);
 
 	if (conferenceOpen) {