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--

In reply to (jeffa) Re: CGI Server Error by jeffa
in thread CGI Server Error by deriwana

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