How to enable usb asics on cgminer or bfg miner

[cessna172z]

when i go to list all known device it say bus 1 device 11 ID: 10c4:ea60 silicon labs cp2102 usb to uar bridge controller inactive.
but when go to enable device and type 11 for device number it says invalid selection.

[melt]

Look in the conf file for further configuration of cgminer/bfgminer. For more details look at the cgminer/bfgminer docs.