I forgot to do something und cannot remember, please give me the hint.

Scenario:
I have an ISAPI running on W2003 / IIS6. Just a simple call with some text
response. So far this is running, call it and get the response.

As soon as I embed a ADS unit e.g. for the AdsConnection, the IIS comes up
with asking for UserID and Password. And I don't know, for what!

I have the ads.ini and the ADS dll's in C:\WINDOWS\SysWOW64\inetsrv\
the isapi is in a directoty of one site, where IIS_WPG has the right to read

What is wrong? What did I forget?

TIA, Detlef