As in all of the earlier times you asked this question, it would be helpful to know the contents of the web server's error log. Failing that, you could run it from the command line and let us know how that fares.

At a guess, I wonder if you're having trouble accessing the file /cgi-bin/data/igb-data.ais On most web servers, the cgi-bin directory is not in the server's root directory (even though you might think so from the URL).

So perhaps the file you're looking for is really: $WWW_HOME/cgi-bin/data/igb-data.ais

If this is the case, you'd see it as an error message when you try to open the file. If you ever checked for the error messages, that is...

buckaduck