diff --git a/doc/ChangeLog b/doc/ChangeLog
index 489329304..1619950f5 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,5 +1,9 @@
 2011-07-21  vadim  <vadim@netcitadel.com>
 
+	* XMLTools.cpp (convert): see #2577 Updated error message that
+	appears when user tries to open .fwb file created by the future
+	version of fwbuilder.
+
 	* TextFileEditor.cpp (save): fixes #2567 "If file doesn't exist
 	when clicking 'edit file', then you have to hit save button twice".
 	The bug affected "edit file" function in the Address Table object
diff --git a/src/libfwbuilder/src/fwbuilder/XMLTools.cpp b/src/libfwbuilder/src/fwbuilder/XMLTools.cpp
index c93a4d426..cc2f0f464 100644
--- a/src/libfwbuilder/src/fwbuilder/XMLTools.cpp
+++ b/src/libfwbuilder/src/fwbuilder/XMLTools.cpp
@@ -780,13 +780,17 @@ xmlDocPtr XMLTools::convert(xmlDocPtr doc,
         if(c<0)
         {
             string err;
-            err = string("Data file '");
+            err += string("The file '");
             err += file_name;
-            err += string("' was created by the future version of Firewall Builder.\n");
-            err += string(" File version: ");
-            err += vers;
+            err += string("' ");
+            err += string("was created by a newer version of "
+                          "Firewall Builder, please upgrade in order to "
+                          "open this file.");
             err += string("\n");
-            err += string(" Current libfwbuilder data format version: ");
+            err += string("\n");
+            err += string("DTD version in the file: ");
+            err += vers;
+            err += string(" current: ");
             err += current_version;
             throw FWException(err);
         }