Wether does it successful or unreachable?

Hi, all:

How can I check what happen with my own NIC driver which response "successful" when local PC "ping" a remote linux PC but "unreachable" when it "ping" a remote windows XP PC? My writed driver runs in linux 3.0.4 kernel.

thanks!
li, kunlun

As usual, the problem is with Windows.

Windows XP and newer never bother answering ping.