How to *ENABLE* icmp redirect on windows xp workstation ?

Hi:

I have some problem with icmp redirect.

I already set the register key HKEY_LOCAL_MACHINE\SYSTEM
\CurrentControlSet\Services\Tcpip\Parameters\EnableICMPRedirects to 1,
and let icmp redirect bypass the windows firewall.

I checked that gateway send the icmp redirect packet, but it seems
that windows just ignore it.

Thanks.
.

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