Arkmicro Technologies Inc. ARK3116 Serial

Hi I am trying to use an Arkmicro Technologies ARK3116 USB to serial cable to communicate with my C118. I have compiled Osmocom-bb successfully on my Debian Squeeze laptop. When I try to run the osmocon utility I get an error "Cannot open serial device /dev/ttyUSB0" My dmesg etc output is: [ 769.752182] usb 5-2: new full speed USB device using uhci_hcd and address 5 [ 769.908979] usb 5-2: New USB device found, idVendor=6547, idProduct=0232 [ 769.908988] usb 5-2: New USB device strings: Mfr=1, Product=3, SerialNumber=0 [ 769.908995] usb 5-2: Product: USB-UART Controller [ 769.909000] usb 5-2: Manufacturer: ArkMicroChips [ 769.909192] usb 5-2: configuration #1 chosen from 1 choice [ 770.029492] usbcore: registered new interface driver usbserial [ 770.029740] USB Serial support registered for generic [ 770.030002] usbcore: registered new interface driver usbserial_generic [ 770.030005] usbserial: USB Serial Driver core [ 770.047650] USB Serial support registered for ark3116 [ 770.048263] ark3116 5-2:1.0: ark3116 converter detected [ 770.076254] usb 5-2: ark3116 converter now attached to ttyUSB0 [ 770.076305] usbcore: registered new interface driver ark3116 ls -l /dev/tty* crw-rw---- 1 root dialout 4, 64 Apr 27 21:01 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 Apr 27 21:01 /dev/ttyS1 crw-rw---- 1 root dialout 4, 66 Apr 27 21:01 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 Apr 27 21:01 /dev/ttyS3 crw-rw---- 1 root dialout 188, 0 Apr 27 21:14 /dev/ttyUSB0 lsusb Bus 005 Device 005: ID 6547:0232 Arkmicro Technologies Inc. ARK3116 Serial Bus 005 Device 004: ID 09da:0006 A4 Tech Co., Ltd Optical Mouse WOP-35 / Trust 450L Optical Mouse Bus 005 Device 003: ID 1631:5002 Good Way Technology Bus 005 Device 002: ID 1631:5400 Good Way Technology Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub So I am assuming the drivers are installed correctly but if I run osmocon I get: ./osmocon -p /dev/ttyUSB0 -m c123xor ../../target/firmware/board/compal_e88/loader.compalram.bin Cannot open serial device /dev/ttyUSB0 My Question is, does anyone here have any experience with the Arkmicro Technologies ARK3116 Serial cable? Is there something I have missed? Thanks Tokala