Problem using a .mo file for WPML, twentyeleven and Marketpress

Hello WPMU Team,

I am following the instructions in the WPML menu (Theme and Plugin Localization - towards the bottom there is a link to this page: http://wpml.org/documentation/getting-started-guide/theme-localization/). I have downloaded the .mo file and placed in the correct directory.

I am translating into German. The de_DE file is found, as is the directory wp-includes/languages. Again on the WPML-Themes and Plugin Localization page, it is complaining "File not found!" under the heading "MO file in /wp-content/themes/twentyeleven". There is however a .POT file in wp-content/themes/twentyeleven/languages/ - should I be expecting a .mo or .po file here?

I am also using Marketpress. Are there already good .mo files for German translation available for Marketpress in the public domain?

Thank you,
Hoss