USB to IrDA - Arkmicro

[Markos <markos@c2o.pro.br>]

Hello,

I'm trying to use an interface USB to IrDA Debian Lenny.

I installed the packages usbutils and irda-utils and edited the file
/etc/default/irda-utils

ENABLE = "true"
AUTOMATIC = "true"
DISCOVERY = "true"
DEVICE = "/ dev/ttyUSB0"
DONGLE = "none"
Setserial = ""

When I connect the interface the command dmesg show:

usb 1-1: new full speed USB device using uhci_hcd and address 4
[ 2043.312223] usb 1-1: configuration #0 chosen from 1 choice
[ 2043.312223] usb 1-1: config 0 descriptor??
[ 2043.314623] usb 1-1: New USB device found, idVendor=18ec,
idProduct=3118
[ 2043.314629] usb 1-1: New USB device strings: Mfr=1, Product=3,
SerialNumber=0
[ 2043.314632] usb 1-1: Product: USB TO IRDA 
[ 2043.314635] usb 1-1: Manufacturer: ARKMICRO

Then I run 

modprobe ark3116

end dmesg show:

 usbserial: USB Serial support registered for ark3116
[ 2058.438743] usbcore: registered new interface driver ark3116
[ 3183.161936] CE: hpet increasing min_delta_ns to 15000 nsec

But when I run :

# /etc/init.d/irda-utils start

the message

Starting IrDA service: irattachFailed to open device / dev/ttyUSB0: No
such file or directory

Anyone have experience with this interface?

Thanks in advance for any help. 
Markos
www.c2o.pro.br