Using isapi dll's under IIS 2.0 HELP ????

Having installed IIS 2.0 and NT 4.0
I'v got hold of an isapi demo app.

iis_demo.dll which uses demo\data tables that
come with Delphi.

after having put the iis_demo.dll in the scripts
I get http errors like 501 and 500

HTTP/1.0 500 Server Error (The system cannot find the path specified.)

Please help what am I doing wrong ???

Please email

Thanx in advance:)
--
------    Grafisk R?dgivning a.s   ---------
------- Dag ?verby ==> dove...@sn.no -------