Sim card traffic is not shown in the simtrace-sniff application

Hello! We purchased your product (simtrace2) to produce sniff sim cards. I did all the steps to install simtrace2 for HostPC (Preconditions, Compiling, Accessing) I made sure that the computer recognizes the simtrace2 device via the simtrace2-list application. But when the simtrace2-sniff application is launched, only the application greeting, the usb device used and the inscription "Entering main loop" are shown. When sending messages to a sim card, the light indicators on the simtrace2 board start to respond to this SMS, but nothing happens in the output of the simtrace2-sniff application on the computer. What could be the reason for this problem? Please help me figure it out, if possible. Best regards, Dmitry -- *WITH BEST WISHES * DMITRY KRYMOV