what is n-proxy or nproxy in relation to ISA 2004?

One of our sites uses a service to obtain maps and development information
in the UK (Promap). Since installing SP1 and ISA 2004 we have had some
difficulty accessing this service which is web based and uses active -X
controls. We have added the service sites to trusted sites on the
workstation but still very intermittent availability.
Promap technical support has said that is ISA 2004 is set up for n-proxy
promap will not work - can anyone tell me if ISA 2004 uses n-proxy? of if
anyone has any suggestions to diagnose the problem?
Theo


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