Languages file trouble

hello,
I download the language file.
I place the two files in / wp-content/languages ​​/
So I
/ wp-content/languages/theme-my-login-fr_FR.po
/ wp-content/languages/theme-my-login-fr_FR.mo

But the translation does not work.
what i do it wrong?

Please Help
Thanks

http://wordpress.org/extend/plugins/theme-my-login/