System error

error:  Can't locate object method "header_in" via package "Apache2::RequestRec" at /webroot/malcolmmason/midifrance.net/segala/segala.mas line 6.
context: 
... 
2:  % $m->call_next(%ARGS);
3:  <hr />
4: 
5:  <p class="footer">
6:  % if ($r->header_in("Referer")) {
7:  <a class="foot" href="<% $r->header_in("Referer") %>">Previous</a>
8:  % }
9:  <& SELF:links &></p>
10:  <%method create>2004</%method>
... 
code stack:  /webroot/malcolmmason/midifrance.net/segala/segala.mas:6
/webroot/malcolmmason/midifrance.net/autohandler:61
raw error






























Can't locate object method "header_in" via package "Apache2::RequestRec" at /webroot/malcolmmason/midifrance.net/segala/segala.mas line 6.


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/midifrance.net/segala/segala.mas line 6.^J') called at /webroot/malcolmmason/midifrance.net/segala/segala.mas line 6
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xa925e28)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1278
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1268
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 937
HTML::Mason::Request::call_next('HTML::Mason::Request::ApacheHandler=HASH(0xa88ffc0)') called at /webroot/malcolmmason/midifrance.net/autohandler line 61
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0xa91c9c8)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1276
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1268
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 467
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 467
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 419
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0xa88ffc0)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 165
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0xa88ffc0)') called at /usr/share/perl5/HTML/Mason/ApacheHandler.pm line 831
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0xa919ef0)', 'Apache2::RequestRec=SCALAR(0xa919ee0)') called at (eval 795) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache2::RequestRec=SCALAR(0xa919ee0)') called at -e line 0
eval {...} at -e line 0