Call to undefined function

Hi,
Just installed plugin and when I go to the settings page I get the following error on two different intsalls:
Fatal error: Call to undefined function scrd_options_tab() in G:\xampp\htdocs\wordpress\wp-content\plugins\rss-digest\rss-digest.php on line 320

Any ideas on this error?

http://ww.wp.xz.cn/extend/plugins/rss-digest/