Exhibit plugin error. cannot login anymore?

i installed and enabled the exhibit plugin, and now whenever i try to login or go to the login screen i get the following error:

Fatal error: Call to undefined function: get_currentuserinfo() in /home/msjerile/public_html/blog/wp-content/plugins/exhibit10.php on line 205

line 205 currently contains:
get_currentuserinfo();

page can be found at: http://www.msjerilee.com/blog