SetLinks Article error: host error

Warning: Cannot modify header information - headers already sent by (output started at /home/wm60/public_html/fondrms.ru/articles.php:9) in /home/wm60/public_html/fondrms.ru/sl_articles/slarticles.php on line 83
SetLinks Article error: host error

Fatal error: Call to undefined method SLArticlesClient::print_header() in /home/wm60/public_html/fondrms.ru/articles.php on line 12