WP-sticky errors

Hi guys , i want to activate WP-sticky plugin but everytime i activate it i get this error, it was working fine with 2.6.5 but not with 2.7, i upgraded to 2.7

Error is:

Fatal error: Cannot redeclare is_sticky() (previously declared in /home/admin/domains/######.com/public_html/wp-includes/post.php:756) in /home/admin/domains/#######.com/public_html/wp-content/plugins/wp-sticky/wp-sticky.php on line 150

Removed my sitename with “#####”

please let me know guys, i really want this plugin or if u know any alternatives please let me know, i just want to stick 1 post forever on my main page as my 1st pos post.