I have a web application dll that is running under iis6. This is starting a number of processes to be able to handle more than one request at the time. This is working perfect in a numbers of installations.

In this particular installation, it runs perfectly when initialized by a call in IE on the server using http://localhost/apppath . The problem is when the processes are from another location, i.e. another computer on the same network initialising the call throught http://servername/apppath . In this case, the initial dll running under iis is executing (proved by logging), but it fails to initialize the additional processes.

If the additional processes are already initialized by a call from localhost, it also works when called from another machine (in this case, it is just attached to the existing processes).