please help me!!

i already install linux ver8, for routing porposes I had 2 NIC(lan card) ethe0 and eht1.. the ip address of first nic is 192.168.0.1 255.255.255.0 the second one is 192.168.1.1 255.255.255.0 then my pc directly connected to the eth1 using cross over cable I already ping the to network eth1 and eth0 . the problem is i can not ping all pc connected to eth0. my routing table will not work