Girmauro,
What revision of USB ML MON08 are you using? What is the firmware version number?
You have to make sure that you are using the latest P&E software.
Please submit a support request here:
http://www.pemicro.com/SRS/main_screen_user.cfmWe will then provide you with the latest software that we probably solve your problem.
Best Regards,
Zahar
P&E