diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/WDocActionPanel.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/WDocActionPanel.java
index 3d00d56904..03392b8435 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/WDocActionPanel.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/panel/WDocActionPanel.java
@@ -379,7 +379,7 @@ public class WDocActionPanel extends Window implements EventListener<Event>, Dia
 				String docAction = lstDocAction.getSelectedItem().getLabel();
 				MessageFormat mf = new MessageFormat(Msg.getMsg(Env.getAD_Language(Env.getCtx()), "ConfirmOnDocAction"));
 				Object[] arguments = new Object[]{docAction};
-				FDialog.ask(0, this, mf.format(arguments), new Callback<Boolean>() {
+				FDialog.ask(gridTab.getWindowNo(), this, "", mf.format(arguments), new Callback<Boolean>() {
 					@Override
 					public void onCallback(Boolean result) {
 						if(result)
diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/FDialog.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/FDialog.java
index ff925623e0..5fa788a4ac 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/FDialog.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/window/FDialog.java
@@ -315,7 +315,11 @@ public class FDialog
 		if (adMessage != null && !adMessage.equals(""))
 			out.append(Msg.getMsg(Env.getCtx(), adMessage));
 		if (msg != null && msg.length() > 0)
-			out.append("\n").append(msg);
+		{
+			if (out.length() > 0)
+				out.append("\n");
+			out.append(msg);
+		}
 		String s = out.toString().replace("\n", "<br>");
 
     	Callback<Integer> msgCallback = null;
@@ -579,7 +583,11 @@ public class FDialog
 		if (adMessage != null && !adMessage.equals(""))
 			out.append(Msg.getMsg(Env.getCtx(), adMessage));
 		if (msg != null && msg.length() > 0)
-			out.append("\n").append(msg);
+		{
+			if (out.length() > 0)
+				out.append("\n");
+			out.append(msg);
+		}
 		String s = out.toString().replace("\n", "<br>");
 
         int response = Messagebox.showDialog(s, title, Messagebox.OK | Messagebox.CANCEL, Messagebox.QUESTION, msgCallback, (msgCallback == null));