Please help with NAT

[Eugene]

>Sorry for the stupid question, but I can't get NAT working properly on 
my machine.
>Generally speaking, I cannot reach internet from LAN machines, while 
natd is running and packets are being forwarded to the 'external' 
interface.
>Please tell me, if there is a problem with natd configuration or I 
miss something while configuring  system or what?
>The machine itself can access internet and ping any host in LAN.

Thanks to all who replied to me for help!
I've changed natd call to ipnat call and it works fine now!
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Sorry for my poor English...