Units have a HP procurve yl - 6200-24 g mGBIC (J8992A) the console configuration is RS232 serial port, to old change new, changed a new back, no packaging, I bought on the net a USB to RS232 cable, why is not configured to configure interface? Use what's wrong with the 6200 switch to configure SecureCRT software? Don't use USB transfer 232 configuration of this line?