If he's running it from a personal cgi-bin directory, then quite likely it's running under suexec, which is extremely finnicky about permissions. In particular, the permissions in his cgi-bin directory (and his home directory, which I assume is cgi-bin's parent) should probably be set to 711 (though 755 might be ok). To see If the script really is running and it's just generating an error, add 
use CGI::Carp qw/fatalsToBrowser/;

[download]
near the top of the script.

In reply to Re: CGI: Premature end of script headers by Errto
in thread CGI: Premature end of script headers by true

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