SOAP Extension not called

[Søren]

I have a web service with a SOAP extension loggin the SOAP.

In the client's config file a <soapExtensionTypes> section is added and the
SOAP extension is called as expected.

Now the client is to be hosted by third party, and I want to be able to
enable/disable the logging from the web.config of the web service.
So I pasted the following into the web.config file (within the <system.web>
section):

<webServices>
<soapExtensionTypes>
<add type="SOAPExtensionLogger.TraceExtension,SOAPExten sionLogger"
priority="1" group="0"/>
</soapExtensionTypes>
</webServices>

But now it is not being called (testing from a SOAP client, not http get)

I then put an attribute [TraceExtension()] on one method and tested - now it
is working again.

But why can't I make it work from the web.config file? please help!