Navman E series gps

[Tonsa]

I have a problem. I hope someone had a fix for it. I have a navman gps the e series for the laptop. It has a 4 pin mini din connector that connect to a usb adaptor then to my laptop.

Is there anyone out there that got this working with the ipaq 3900, 5400, 5500 series?

If someone has a cable or a fix for this I would really appreciate.

Thanks in advance.