Can't exit Transparent Access Mode?

Hello guys
I have connected my device to my phone through Bluetooth
and I succeded to send and receive messages via Transparent Access Mode
but when I want to exit “Transparent Access Mode” via “+++” sequence, nothing happens
it is treated as normal message
what should I do ?

have you added the “Enter” at the end of the command?

I type “+++” and then press Enter, but it is treated as normal message

pls tell me your Skype, let me help you to debug remotely.