When I press "Quick Check" to check up new links I've recieved such error:
Links Manager: Verifying Links
Verifying Links
Link checking started at: Sun Nov 21 19:22:46 1999
--------------------------------------------------------
Registering URLs ...
Content-type: text/html


CGI ERROR
==========================================
Error Message : Fatal error: Can't call method "as_string" on an undefined value at /home/elenag/public_html/cgi-bin/links/admin/LWP/Parallel/UserAgent.pm line 393, chunk 1.

Script Location : nph-verify.cgi
Perl Version : 5.00502



What should I do?