R100 network dramas

[Deanus]

I have a Diamond Digital R100 connected to the desktop and the usb adaptor to the laptop.
THe internet connection works fine, but I can't ping the laptop from desktop or ping the desktop from laptop but both pcs can ping the R100.

And coz they wont ping I cant share files.

I'd love to hear any suggestions to help me out because I've tried everything with no joy.

Thanks

[Greenstead]

I don't know this product. The USB is for a PC to connect to?

http://www.todaytech.com.au/view_products.asp?PID=1981