[p00rleno]

if you think its somewhere in 10.xx.yy.zzz then you can always do a Ping Subnet and see what you get, it might just be set to take a DHCP address and is getting something higher. Or, it could not be configured in agreement with the router on how to determine IP address, and thus conflicting. Just futz around with it until it works, thats how we figured it out (an hour later)