Server error? Is this a command line Perl script or a CGI script? If it's CGI, don't forget that the first thing you have to print to STDOUT is the header:

print "Content-type: text/html\n\n";

# rest of code
[download]

Or better yet, use CGI!

use CGI ':standard';

print header();

# rest of code
[download]

And as an added bonus, here is a one-liner that will replace the string 'date' with localtime:

perl -pie 's/date/localtime/eg' guestbook.html
[download]

Jeff

R-R-R--R-R-R--R-R-R--R-R-R--R-R-R--
L-L--L-L--L-L--L-L--L-L--L-L--L-L--