Ok Keith first some checks:
under Computer Management Console open the properties of your site, you should do this on the site computer and not on another one since you may need to point to some files on that computer.
open the properties of the site click on the Home Directory tab, under the Application Settings click on the Configuration button on the form that is open look for .wsdl on the extension column if no found then
click on the add button now on the executable type the following C:\PROGRA~1\COMMON~1\MSSoap\Binaries\soapisapi.dll,
on the verbs choose limit to and put GET, POST, HEAD click on the ok button
click on all ok's buttons and you should be able to call your web service using the isapi listener.

>I applogize for the remarks but some times it gets a quicker response. How did you get the isapi soapisapi setup with iis5.0 to work ? I would be in your deit to have the answer to this.
>
>Thanks for your response Alexandre