Routing problem

[George Vanev]

I have FreeBSD 6.2 box with 1 NIC and 2 IPs.
The first IP is to access internet, the second
is for the ISP's LAN.
Unfortunately I have internet, but no access to
the other network.

I made a test. I assigned to the NIC only the local
IP and removed the defaultrouter. Then, of course,
I have no internet but was able to access the ISP's
network.

I've tried everything I know, but still nothing
-- 
George Vanev