[Plugin: Hyphenator] Exceptions not working

Since in the title of one my blogs (http://www.elasesordevinos.com.ar) one of the words (semana) appears hyphenated, I tried adding it to the exceptions so it wouldn’t be hyphenated. Unfortunately it still gets hyphenated. I am usuing version 2.0 under WP 2.7.1
Does anybody know a solution?
Thanks,
Francisco

http://ww.wp.xz.cn/extend/plugins/hyphenator/