[Plugin: WPtouch] New language file detection

I translated WPTouch to Estonian for my site and uploaded the et_EE.po file to wptouch/lang directory, but the new language isn’t listed in WPtouch options.

I also followed the language catalogue options. Everything is set and correct.

What may be the problem?

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