IIS 6.0: No status change to CONT requests

xymon version is "xymon-4.3.0-0.20101114.beta3" on openSUSE 11.3 x64.
I'm using the following CONT request to an IIS 6.0 server:

"10.45.64.61    SSGIS01 #  cont=Altlasten;
http://SSGIS01.kreis-steinfurt.lokal/ArcGIS/services/Maps/Altlasten/MapServer?wsdl
;"www.esri.com" \
   cont=Abgrabungen;
http://SSGIS01.kreis-steinfurt.lokal/ArcGIS/services/Maps/Abgrabungen/MapServer?wsdl
;"www.esri.com" \
   cont=Aufschuettungen;
http://SSGIS01.kreis-steinfurt.lokal/ArcGIS/services/Maps/Aufschuettungen/MapServer?wsdl
;"www.esri.com""


Following is the response, I got once when I had the 2 first CONTs defined. Adding the third made no difference. The
difference between the xymon time and the server time should be okay as we are 1 hour off GMT.

"Mon Jan 3 13:13:29 2011: OK ; Configuration Maps/Altlasten.MapServer is not started.

green http://SSGIS01.kreis-steinfurt.lokal/ArcGIS/services/Maps/Abgrabungen/MapServer?wsdl - OK

HTTP/1.1 200 OK
Connection: close
Date: Mon, 03 Jan 2011 12:14:35 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Type: text/xml
Content-Length: 270681

Seconds:     0.25


red http://SSGIS01.kreis-steinfurt.lokal/ArcGIS/services/Maps/Altlasten/MapServer?wsdl - Configuration Maps/Altlasten.MapServer is not started.

HTTP/1.1 404 Configuration Maps/Altlasten.MapServer is not started.
Connection: close
Date: Mon, 03 Jan 2011 12:14:35 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Length: 0

Seconds:     0.20"

history.log shows a line "15:05 ... will not update ... SSGIS01.http - color unchanged (purple")
xymonnet.log has a warning at 15:07 "Runtime 678 longer than time limit (300)".

Do these tests simply not run? 
Thanks hjb