diff --git a/onvif/proxy/lib/WSDiscovery10/Elements/Header.pm b/onvif/proxy/lib/WSDiscovery10/Elements/Header.pm
new file mode 100644
index 000000000..df2d7f389
--- /dev/null
+++ b/onvif/proxy/lib/WSDiscovery10/Elements/Header.pm
@@ -0,0 +1,55 @@
+
+package WSDiscovery10::Elements::Header;
+use strict;
+use warnings;
+
+
+__PACKAGE__->_set_element_form_qualified(0);
+
+sub get_xmlns { 'http://schemas.xmlsoap.org/soap/envelope/' };
+
+our $XML_ATTRIBUTE_CLASS;
+undef $XML_ATTRIBUTE_CLASS;
+
+sub __get_attr_class {
+    return $XML_ATTRIBUTE_CLASS;
+}
+
+use Class::Std::Fast::Storable constructor => 'none';
+use base qw(SOAP::WSDL::XSD::Typelib::ComplexType);
+
+Class::Std::initialize();
+
+{ # BLOCK to scope variables
+
+my %Action_of :ATTR(:get<Action>);
+my %MessageID_of :ATTR(:get<MessageID>);
+my %ReplyTo_of :ATTR(:get<ReplyTo>);
+my %To_of :ATTR(:get<To>);
+
+__PACKAGE__->_factory(
+    [ qw( Action MessageID ReplyTo To ) ],
+    {
+        'Action' => \%Action_of,
+        'MessageID' => \%MessageID_of,
+        'ReplyTo' => \%ReplyTo_of,
+        'To' => \%To_of,
+    },
+    {
+        'Action' => 'WSDiscovery10::Elements::Action',
+        'MessageID' => 'WSDiscovery10::Elements::MessageID',
+        'ReplyTo' => 'WSDiscovery10::Elements::ReplyTo',
+        'To' => 'WSDiscovery10::Elements::To',
+    },
+    {
+        'Action' => '',
+        'MessageID' => '',
+        'ReplyTo' => '',
+        'To' => '',
+    }
+);
+
+} # end BLOCK
+
+
+1;
diff --git a/onvif/proxy/lib/WSDiscovery10/Typemaps/WSDiscovery.pm b/onvif/proxy/lib/WSDiscovery10/Typemaps/WSDiscovery.pm
index 4429a517b..f0d7b7931 100644
--- a/onvif/proxy/lib/WSDiscovery10/Typemaps/WSDiscovery.pm
+++ b/onvif/proxy/lib/WSDiscovery10/Typemaps/WSDiscovery.pm
@@ -25,10 +25,10 @@ our $typemap_1 = {
                'ProbeMatches/ProbeMatch/EndpointReference/ReferenceProperties' => 'WSDiscovery10::Types::ReferencePropertiesType',
                'ProbeMatches/ProbeMatch/EndpointReference/PortType' => 'WSDiscovery10::Types::AttributedQName'
                'MessageID' => 'WSDiscovery10::Elements::MessageID',
-               'RelatesTo' => '__SKIP__',
-               'To' => '__SKIP__',
-               'Action' => '__SKIP__',
-               'AppSequence' => '__SKIP__',
+               'RelatesTo' => 'WSDiscovery10::Elements::RelatesTo',
+               'To' => 'WSDiscovery10::Elements::To',
+               'Action' => 'WSDiscovery10::Elements::Action',
+               'AppSequence' => 'WSDiscovery10::Elements::AppSequence',
              };
 ;
 
diff --git a/onvif/scripts/zmonvif-probe.pl b/onvif/scripts/zmonvif-probe.pl
index 93c12959f..8f1fccd17 100755
--- a/onvif/scripts/zmonvif-probe.pl
+++ b/onvif/scripts/zmonvif-probe.pl
@@ -25,13 +25,14 @@
 #
 
 use Getopt::Std;
+use Data::UUID;
 
 require ONVIF::Client;
 
 require WSDiscovery10::Interfaces::WSDiscovery::WSDiscoveryPort;
+require WSDiscovery10::Elements::Header;
 require WSDiscovery10::Elements::Types;
 require WSDiscovery10::Elements::Scopes;
-require WSDiscovery10::Elements::To;
 
 require WSDiscovery::TransportUDP;
 
@@ -169,6 +170,8 @@ sub discover
   ## try both soap versions
   my %services;
 
+  my $uuid_gen = Data::UUID->new();
+
   if($verbose) {
     print "Probing for SOAP 1.1\n"
   }
@@ -177,12 +180,18 @@ sub discover
   });
   $svc_discover->set_soap_version('1.1');
 
+  my $uuid = $uuid_gen->create_str();
+
   my $result = $svc_discover->ProbeOp(
     { # WSDiscovery::Types::ProbeType
       Types => 'http://www.onvif.org/ver10/network/wsdl:NetworkVideoTransmitter http://www.onvif.org/ver10/device/wsdl:Device', # QNameListType
       Scopes =>  { value => '' },
     },
-      WSDiscovery10::Elements::To->new({ value => 'urn:schemas-xmlsoap-org:ws:2005:04:discovery' })
+    WSDiscovery10::Elements::Header->new({
+      Action => { value => 'http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe' },
+      MessageID => { value => "urn:uuid:$uuid" }, 
+      To => { value => 'urn:schemas-xmlsoap-org:ws:2005:04:discovery' },
+    })
   );
 #  print $result . "\n";
 
@@ -197,12 +206,20 @@ sub discover
   });
   $svc_discover->set_soap_version('1.2');
 
+  # copies of the same Probe message must have the same MessageID. 
+  # This is not a copy. So we generate a new uuid.
+  $uuid = $uuid_gen->create_str();
+
   $result = $svc_discover->ProbeOp(
     { # WSDiscovery::Types::ProbeType
       Types => 'http://www.onvif.org/ver10/network/wsdl:NetworkVideoTransmitter http://www.onvif.org/ver10/device/wsdl:Device', # QNameListType
       Scopes =>  { value => '' },
     },
-      WSDiscovery10::Elements::To->new({ value => 'urn:schemas-xmlsoap-org:ws:2005:04:discovery' })
+    WSDiscovery10::Elements::Header->new({
+      Action => { value => 'http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe' },
+      MessageID => { value => "urn:uuid:$uuid" }, 
+      To => { value => 'urn:schemas-xmlsoap-org:ws:2005:04:discovery' },
+    })
   );
 #  print $result . "\n";