Actaris Itron - SL7000 761 - "disconnected mode" problem

Good morning.
I'm simply trying to verify why the DSO can no longer read, via the GSM modem system with SIM DATA CSD,

The Modem-GSM system seems ok.

I also wanted to test the operation of the "Utility's Port" of the meter with my pc (3 wire conection?).

The meter is Actaris Itron - SL7000 761 - FW 6,24 (2013)

I think Gurux is fine for this test.

After some trial and error I entered the configuration below

<?xml version="1.0" encoding="utf-8"?>
<GXDLMSDevice xmlns:xsd="http://www.w3.org/2001/XMLSchema&quot; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance&quot; xmlns="Gurux1">
<AuthenticationName>None</AuthenticationName>
<Password />
<KeyAgreementScheme>0</KeyAgreementScheme>
<SystemTitle />
<ServerSystemTitle />
<DedicatedKey />
<BlockCipherKey />
<AuthenticationKey />
<BroadcastKey />
<Challenge />
<Signing>0</Signing>
<PhysicalAddress>17</PhysicalAddress>
<LogicalAddress>1</LogicalAddress>
<ClientAddress>22</ClientAddress>
<MacDestinationAddress>0</MacDestinationAddress>
<InactivityTimeout>120</InactivityTimeout>
<FrameDelay>0</FrameDelay>
<ObjectDelay>0</ObjectDelay>
<SignCipherOrder>0</SignCipherOrder>
<Name>ITRON_SL7000_761</Name>
<Verbose>true</Verbose>
<Conformance>12220486</Conformance>
<Manufacturer>ACE</Manufacturer>
<HDLCAddressing>0</HDLCAddressing>
<UseProtectedRelease>false</UseProtectedRelease>
<SecurityChangeCheck>false</SecurityChangeCheck>
<MediaType>Gurux.Serial.GXSerial</MediaType>
<MediaSettings>&lt;Port&gt;COM4&lt;/Port&gt;</MediaSettings>
<UseLN>true</UseLN>
<Objects2 />
</GXDLMSDevice>

when i am trying to connect by my pc com-port to the "Utility's Port" of the meter the "telephone handset" icon is immediately activated on the meter display for a few seconds and the message "disconnected mode - OK" appears in Gurux on my PC

I am stuck and unable to connect. Please help.