Addresses in the 192.42.1.x range is non-private. (
http://www.faqs.org/rfcs/rfc1918.html) This should be handled by ENS for you (You won't be able to ping using WGIC), but -
ensure that your interfaces are configured so WinGate knows that your range is private / trusted (GateKeeper - Advanced Options) for the different interfaces.
Alternatively, could there be something from your WG Server onwards that is blocking ICMP ? Perhaps from your ISP ?