[afnog] ISA Server problem.

[enock kaseve]

Scenario

1.HQ - Internet connection to pix which is directly
connected to ISA (2004)
server, that is double nat.

2. WAN - Two branches connecting  direct to a router
at HQ.
- the router has a default route to ISA server
- then routes the two other networks to the other
interfaces

3. From ISA Server (integrated mode) to lan.
- External to pix
- internal to lan
- on the local address table i have added the two
brances networks.
- On the ISA firewall policy i have allowed ICMP btw
the three networks

Problem 
WAN users cannot connect to services i.e 
exchange server and a central database server.

But we can all happily ping each other.

Please assist.

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