System error

error:  Can't locate object method "header_in" via package "Apache2::RequestRec" at /webroot/malcolmmason/reynard.info/james/contact.html line 28.
context: 
... 
24:  % if ($r->method eq 'POST') {
25:  <h2>More details please</h2>
26:  <p>Please complete the &#8220;Name&#8221; &amp; &#8220;Email&#8221; fields,<br />without this information he can&#8217;t reply to you!</p>
27:  % } else {
28:  % $referer = $r->header_in("Referer") if $r->header_in("Referer");
29:  % }
30:  <form method="post" enctype="multipart/form-data" action="">
31:  <input type="hidden" name="referer" value="<% $referer %>" />
32:  <p class="text" style="text-transform: lowercase;"><& SELF:title &> : <a class="foot" href="mailto:%20james&#64;reynard%2Efr" title="Click here to send email">by email</a></p>
... 
code stack:  /webroot/malcolmmason/reynard.info/james/contact.html:28
/webroot/malcolmmason/reynard.info/james.mas:6
/webroot/malcolmmason/reynard.info/autohandler:27
raw error






























Can't locate object method "header_in" via package "Apache2::RequestRec" at /webroot/malcolmmason/reynard.info/james/contact.html line 28.


Trace begun at /usr/share/perl5/HTML/Mason/Exceptions.pm line 129
HTML::Mason::Exceptions::rethrow_exception('Can\'t locate object method "header_in" via package "Apache2::RequestRec" at /webroot/malcolmmason/reynard.info/james/contact.html line 28.^J') called at /webroot/malcolmmason/reynard.info/james/contact.html line 28
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x7f49c407ee60)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1305
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 958
HTML::Mason::Request::call_next('HTML::Mason::Request::ApacheHandler=HASH(0x7f49d8074070)') called at /webroot/malcolmmason/reynard.info/james.mas line 6
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x7f49e0034c18)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1305
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 958
HTML::Mason::Request::call_next('HTML::Mason::Request::ApacheHandler=HASH(0x7f49d8074070)') called at /webroot/malcolmmason/reynard.info/autohandler line 27
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 138
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x7f49e003f1a0)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1303
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1295
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 484
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 484
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 436
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0x7f49d8074070)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 165
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0x7f49d8074070)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 831
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0x7f49dc046950)', 'Apache2::RequestRec=SCALAR(0x7f49d8074100)') called at (eval 44) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache2::RequestRec=SCALAR(0x7f49d8074100)') called at -e line 0
eval {...} at -e line 0