Why do I always receive the message "WARNING nxlog-ce received a termination request signal, exiting..." and I don't receive any message using GELF UDP in Graylog input, unless I use Raw/Plaintext UDP?

Panic Soft
#NoFreeOnExit TRUE
define ROOT     C:\Program Files\nxlog
define CERTDIR  %ROOT%\cert
define CONFDIR  %ROOT%\conf\nxlog.d
define LOGDIR   %ROOT%\data
include %CONFDIR%\*.conf
define LOGFILE  %LOGDIR%\nxlog.log
LogFile %LOGFILE%
Moduledir %ROOT%\modules
CacheDir  %ROOT%\data
Pidfile   %ROOT%\data\nxlog.pid
SpoolDir  %ROOT%\data
define IISLOG "C:\inetpub\logs\LogFiles\W3SVC2\u_ex*.log"
#######################################################################
EXTENTIONS
#######################################################################
<Extension _gelf>
Module      xm_gelf
</Extension>
<Extension _json>
Module      xm_json
</Extension>
<Extension fileop>
Module      xm_fileop
</Extension>
#######################################################################
IIS NXLOG
#######################################################################
<Extension w3c>
Module	xm_csv
Fields	$date, $time, $s_ip
FieldTypes	string, string, string
Delimiter 		' '
QuoteChar 		'"'
EscapeControl 	FALSE
UndefValue 		-
</Extension>
<Input iis>
Module   im_file
File     "C:\inetpub\logs\LogFiles\W3SVC2\u_ex*.log"
SavePos  TRUE
Exec if $raw_event =~/^#/ drop();\
   else\
   {\
    w3c-&gt;parse_csv();\
    $EventTime = parsedate($date + " " + $time);\
$EventTime = parsedate($date + " " + $time + "Z");\
    $SourceName = "IIS";\
$raw_event = to_json();\
   }

</Input>
<Output graylog>
Module om_udp
Host 192.168.3.250
Port 1322
OutputType GELF
Exec        $Hostname = hostname_fqdn();
Exec        $raw_event =$Hostname + ' IIS-NXLOG ' + $raw_event;
#Use the following line for debugging (uncomment the fileop extension above as well)
# exec file_write("C:\\Program Files\\nxlog\\data\\nxlog_output.log", $raw_event);

</Output>
<Route iis-to-graylog>
Path		iis => graylog
</Route>