WIZ105SR Configuration with serial command

Hi, I use WIZ105SR with firmware 5.13. It is not possibile to configure the module with the serial commands even if the Serial Configuration is enabled. The module doesn’t enter command mode. No reply to the command “+++”. With the configuration tool 3.0.2 the module works very well and data are received and trasmitted.

Here the settings:
[]Serial debug mode disabled
]Operation mode: server
[]Static IP SM GW Local port 48059
]Serial speed 115200 8N1 no flow
[*]Serial configuration enabled with code 2B2B2B

Any help will be appreciate!