Mapserver not working in IIS, it DOES work command-line

[Jelmer Baas]

Hello everyone,

After a lot of struggling with my maps, I finally have a test 
envirioment up and running. Now I'm moving the whole lot to the server, 
and this gives me a huge problem. When I try to generate a map, I am 
presented with:

CGI Error

The specified CGI application misbehaved by not returning a complete set 
of HTTP headers.

The querystring is good, as is the mapfile (since it all works on my 
test machine).

Info:
  - Windows Server 2003, IIS6.0, fully updated
  - Oracle Mapinfo package from http://hobu.stat.iastate.edu/mapserver/.
  - Works in cmd (mapserv.exe "QUERY_STRING=mode=map&map=cocon.
map&mapext=-70000+280000+400000+630000&mapsize=640+480&layers=netherlands" 
 > test.jpg)
  - I set rights for everyone to full control
  - IIS CAN execute even unknown CGI files.

I'm out of ideas here. Can anyone help? If I at least had a normal error 
message...


Thanks in advance,
Jelmer Baas