I had found this tutorial here. I was very happy at the beginning but it seem not useful at the end. I had try step by step the command but still get an error.
root@cceng:~# sudo modprobe usbserial; sudo insmod ark3116
here is the error i get:
insmod: can’t read ‘ark3116′: Is a directory
em.. i was really hope to make this usb to rs232 converter work well.. need more time to explore and learn. If any of your guys had found the solution please share the knowledge.. ok…

I was using Ubuntu 7.04