OMG~ my SuSE can't get on net.

ravingboy

SuSE8.2.....NIC,IP,SubnetMask,Gateway are all typed right..
but it still out of net...

ping 127.0.0.1
ping myIP
work correctly

ping myDNS
ping myGateway
incorrect..........

Who can help me?
p.s:I am newer of SuSE...