diff --git a/src/warden-server/bin/registerReceiver.pl b/src/warden-server/bin/registerReceiver.pl
index c521d1b75b1ec258031893a742311363a33e9420..891d2a08d4caaeb8a0e891133020928f1da4600e 100755
--- a/src/warden-server/bin/registerReceiver.pl
+++ b/src/warden-server/bin/registerReceiver.pl
@@ -40,13 +40,13 @@ WardenCommon::loadConf($conf_file);
 #                               FUNCTIONS
 ################################################################################
 sub usage {
-  print "Usage: $RealScript -n <hostname> -r <requestor> -t <type> -o -c <ip_net_client> [-i <client_id> -h -V]\n";
+  print "Usage: $RealScript -n <hostname> -r <requestor> -t <type> -o -c <cidr> [-i <client_id> -h -V]\n";
   exit 1;
 }
 
 
 sub help {
-  print "$RealScript -n <hostname> -r <requestor> -t <type> -o -c <ip_net_client> [-i <client_id> -h -V]\n";
+  print "$RealScript -n <hostname> -r <requestor> -t <type> -o -c <cidr> [-i <client_id> -h -V]\n";
   print "-n     hostname of receiver\n";
   print "-r     e-mail address of client registration requestor\n";
   print "-t     type of received events or '_any_' for receiving of all types of events\n";
@@ -114,11 +114,10 @@ if ($script_version) {
 
 # check parameters definition
 switch () {
-  case {!defined $hostname} 		{WardenCommon::errMsg("Parameter 'hostname' is not defined!")}
-  case {!defined $requestor} 		{WardenCommon::errMsg("Parameter 'requestor' is not defined!")}
-  case {!defined $type}			{WardenCommon::errMsg("Parameter 'type' is not defined!")}
-  case {!defined $receive_own_events}	{WardenCommon::errMsg("Parameter 'receive_own_events' is not defined!")}
-  case {!defined $ip_net_client} 	{WardenCommon::errMsg("Parameter 'ip_net_client' is not defined!")}
+  case {!defined $hostname} 		{WardenCommon::errMsg("Parameter '-n <hostname>' is not defined!")}
+  case {!defined $requestor} 		{WardenCommon::errMsg("Parameter '-r <requestor>' is not defined!")}
+  case {!defined $type}			{WardenCommon::errMsg("Parameter '-t <type>' is not defined!")}
+  case {!defined $ip_net_client} 	{WardenCommon::errMsg("Parameter '-c <cidr>' is not defined!")}
 }
 
 # check validity of IP address (CIDR format)
@@ -128,7 +127,7 @@ if ($ip_net_client !~ /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}(
 
 # check client ID
 if (defined $client_id && $client_id !~ /^\d+\z/) {
-  WardenCommon::errMsg("Parameter 'client_id' is not a integer!");
+  WardenCommon::errMsg("Parameter '-i <client_id>' is not a integer!");
 }
 
 # defined variables by script
diff --git a/src/warden-server/bin/registerSender.pl b/src/warden-server/bin/registerSender.pl
index 725069d08f657bfd6ac914767b134ef86c02f83e..fc7d48b51bc754f0064cecfcb899255abff06ead 100755
--- a/src/warden-server/bin/registerSender.pl
+++ b/src/warden-server/bin/registerSender.pl
@@ -40,13 +40,13 @@ WardenCommon::loadConf($conf_file);
 #                               FUNCTIONS
 ################################################################################
 sub usage {
-  print "Usage: $RealScript -n <hostname> -r <requestor> -s <service> -d <description_tags> -c <ip_net_client> [-i <client_id> -h -V]\n";
+  print "Usage: $RealScript -n <hostname> -r <requestor> -s <service> -d <description_tags> -c <cidr> [-i <client_id> -h -V]\n";
   exit 1;
 }
 
 
 sub help {
-  print "$RealScript -n <hostname> -r <requestor> -s <service> -d <description_tags> -c <ip_net_client> [-i <client_id> -h -V]\n";
+  print "$RealScript -n <hostname> -r <requestor> -s <service> -d <description_tags> -c <cidr> [-i <client_id> -h -V]\n";
   print "-n 	hostname of sender\n";
   print "-r 	e-mail address of client registration requestor\n";
   print "-s 	name of service which sent events\n";
@@ -110,11 +110,11 @@ if ($script_version) {
 
 # check parameters definition
 switch () {
-  case {!defined $hostname} {WardenCommon::errMsg("Parameter 'hostname' is not defined!")}
-  case {!defined $requestor} {WardenCommon::errMsg("Parameter 'requestor' is not defined!")}
-  case {!defined $service} {WardenCommon::errMsg("Parameter 'service' is not defined!")}
-  case {!defined $description_tags} {WardenCommon::errMsg("Parameter 'description_tags' is not defined!")}
-  case {!defined $ip_net_client} {WardenCommon::errMsg("Parameter 'ip_net_client' is not defined!")}
+  case {!defined $hostname} {WardenCommon::errMsg("Parameter '-n <hostname>' is not defined!")}
+  case {!defined $requestor} {WardenCommon::errMsg("Parameter '-r <requestor>' is not defined!")}
+  case {!defined $service} {WardenCommon::errMsg("Parameter '-s <service>' is not defined!")}
+  case {!defined $description_tags} {WardenCommon::errMsg("Parameter '-d <description_tags>' is not defined!")}
+  case {!defined $ip_net_client} {WardenCommon::errMsg("Parameter '-c <cidr>' is not defined!")}
 }
 
 # check validity of IP address (CIDR format)
@@ -124,7 +124,7 @@ if ($ip_net_client !~ /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}(
 
 # check client ID
 if (defined $client_id && $client_id !~ /^\d+\z/) {
-  WardenCommon::errMsg("Parameter 'client_id' is not a integer!");
+  WardenCommon::errMsg("Parameter '-i <client_id>' is not a integer!");
 }
 
 # defined variables by method