3xNIC's 2 Subnets on ISA

Hi,

I have the folowing problem:
Szenario: ISA equipped with 3 NIC's, one 192.168.x.y for the LAN,
two external 62.138.x.y hocked up to a Netopia R7200 SDSL Router
When I try to connect to the first external card via ICMP it responds.
When I try to connect to the second external card it does not respond.
When I disable the first one, and then ping the second one it responds ?

The reason we try this is to configure multiple Weblisteners for multiple
Server and Web-Server publishing.

I thougt it would be possible to add e.g. 6 external NIC's with 6
different
external (public IP's) ?????

I hope someone can help !  

Best,
Mark

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