USB to Serial issues with CE

USB to Serial issues with CE

I am having an issue with windows CE 6.0 Pro on my Wyse Thin Client Cx0 with USB to serial adapters.

I am using a usb to serial adapter to connect a topaz signature capture tablet to the thin client. WinCE detects that the USB to serial is connected and creates a COM 1 port. When I RDP to my terminal server and share the serial port the device does not work. I tested the setup on my laptop and I am able to connect to the terminal server and use the signature tablet without any issue.

Does anyone have any how I can get this to work?

Thanks.