export mp3 problems

I am new to audacity as of last night and am trying to export a prerecorded file to itunes. I have already downloaded the FFmpeg. It says Audacity need the file lame_ec.dll but it is listed next to Browse. When I push OK it says it cannot open MP3 encoding library. I don’t know what step I am missing. Do I need to browse for something else? Redownload FFmpeg. Please offer your suggestions. Thank you.

Download and install the [u]LAME MP3 Encoder[/u].

(FFmpeg is for all the “other” formats.)