Redmine

I've just installed ezLibrarian plugin, it looks quite good, but when I add a new device or a new book, I will got such an error message :
"Template is missing
Missing template lib_mailer/lib_new.text.plain.rhtml in view path /usr/share/redmine/app/views:"

I'm using Redmine 0.9.3.stable (MySQL) from ubuntu 10.04 official repository and ezLibrarian 0.1.5.

Any help will be great.

Thanks