ISA not forwarding my DNS requests

- I have all my clients configured to use my internal dns server.
- The intenal DNS server is configured to forward to my ISP's DNS server. 
(no recursion) through the ISA server.
- The ISA is has protocol rule set for DNS Query allow.
  and packet filter for DNS lookup.
- I want to be able to resolve names using NSlookup from my clients.

It does not work. Any ideas would be appreciated.

karzon

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