Web data blade connectivity using cgi

When accessing the cgi executable (webdriver.exe) the IIS server responds with: ------------------------------------------------------------------- CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are: Status: 500 ------------------------------------------------------------------- The same requests sent directly to the webdriver.exe via the command line on the server executes successfully returning the HTML-pages specified in the MIval variable. Error 500 can be replicated on the command line when using the webdriver.exe and executing without stating the MIval variable it returns: Status 500: No value for 'MIval' specified! It therefore seems that the values that are passed to the webdriver.exe via the WWW-Interface are not being processed properly, OR as we have seen on the server itself, it could mean that the webdriver.exe does not find the web.cnf file at all. Any ideas?? Our configuration: ------------------ Informix Universal Server Web Data Blade IIS Web Server Netscape Browser