[Action Script] Regex with strings that contain non-latin chars May,2012

I am having difficulty with a regex when testing for words that contain non-latin characters (specifcally Japanese, I haven't tested other scripts).

My code:
ActionScript Code: keyword = StringUtil.trim(keyword);//if(keywords.indexOf(keyword) == -1)regex = new RegExp("\\b"+keyword+"\\s*;","i");if(!regex.test(keywords)){Alert.show('"'+keywords+'" does not contain "'+keyword+'"'); keywords += keyword + "; ";}
Where keyword is
Code: 日本国and keywords is
Code: Chion-in; 知恩院; Lily Pond; Bridge; 納骨堂; Nōkotsu-dō; Asia; Japan; 日本国; Nihon-koku; Kansai region; 関西地方; Kansai-chihō; Kyoto Prefecture; 京都府; Kyōto-fu; Kyoto; Higashiyama-ku; 東山区; Places;When the function is run, it will alert that keywords does not contain keyword, even though it does:
Code: "Chion-in; 知恩院; Lily Pond; Bridge; 納骨堂; Nōkotsu-dō; Asia; Japan; 日本国; Nihon-koku; Kansai region; 関西地方; Kansai-chihō; Kyoto Prefecture; 京都府; Kyōto-fu; Kyoto; Higashiyama-ku; 東山区; Places; " does not contain "日本国"Previously I was using indexOf, which doesn't have this problem, but I can't use that since it doesn't match the whole word.

Is this a problem with my regex, is there a modifier I need to add to enable unicode support or something?

Thanks

Dave
Regex with strings that contain non-latin chars

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