Failed to connect to meter using DLMS.Client.Example.Net after Successful DLMS Director Connection

Successfully connected to my meter using DLMS Director, but encountering issues when trying to establish a connection with DLMS.Client.Example.Net using the command line parameters from the last successful connection in DLMS Director. Specifically, the process gets stuck during the IEC sending phase. Any advice or suggestions on how to resolve this situation would be greatly appreciated. What steps should I take to troubleshoot and rectify this issue?

command line parameters were:
-S COM6:300:7Even1 -i HdlcWithModeE -c 6 -a HighGMAC -C AuthenticationEncryption -T 4B464D09EBC1C5FC -A 53646E7967655365704C4533736F4B37 -B 414253695162566C64526564496B7276 -v 0.0.43.1.0.255 -w 1 -f 128 -t Verbose

DLMS.Client.Example.Net generates this:
Standard: DLMS
Security: AuthenticationEncryption
System title: 4B 46 4D 09 EB C1 C5 FC
Authentication key: 53 64 6E 79 67 65 53 65 70 4C 45 33 73 6F 4B 37
Block cipher key 41 42 53 69 51 62 56 6C 64 52 65 64 49 6B 72 76
IEC Sending:/?!

IEC received: /KFM5\2

14:57:50 BaudRate is : 9600
14:57:50 Moving to mode E.
Send SNRM request.7E A0 07 03 21 93 0F 01 7E
TX: 14:57:53 7E A0 07 03 21 93 0F 01 7E
RX: 14:57:53 7E A0 07 21 03 73 01 40 7E
Parsing UA reply.
Parsing UA reply succeeded.
Send AARQ request
TX: 14:57:53 7E A0 2B 03 21 10 FB AF E6 E6 00 60 1D A1 09 06 07 60 85 74 05 08 01 01 BE 10 04 0E 01 00 00 00 06 5F 1F 04 00 62 1E 5D FF FF 88 55 7E
RX: 14:57:53 7E A0 37 21 03 30 6C 7C E6 E7 00 61 29 A1 09 06 07 60 85 74 05 08 01 01 A2 03 02 01 00 A3 05 A1 03 02 01 00 BE 10 04 0E 08 00 06 5F 1F 04 00 00 10 10 04 00 00 07 36 E3 7E
Parsing AARE reply61 29 A1 09 06 07 60 85 74 05 08 01 01 A2 03 02 01 00 A3 05 A1 03 02 01 00 BE 10 04 0E 08 00 06 5F 1F 04 00 00 10 10 04 00 00 07
TX: 14:57:53 7E A0 19 03 21 32 6F D8 E6 E6 00 C0 01 C1 00 01 00 00 2B 01 00 FF 02 00 7D 8F 7E
RX: 14:57:53 7E A0 15 21 03 52 5D 8A E6 E7 00 C4 01 C1 00 06 00 00 0A 03 96 D7 7E
Invocation counter: 2564
Disconnecting from the meter.
TX: 14:57:53 7E A0 07 03 21 53 03 C7 7E
RX: 14:57:53 7E A0 07 21 03 73 01 40 7E
IEC Sending:/?!

(stuck here)