unable to convert audacity to mp3 on mac 10.9.5

I have mac 10.9.5 and down loaded audacity 2.0.6
Trying to convert audio to export mp3 and tells me there is “could not open mp3 encoding library”. I have down loaded Lame Library v3.98.2 for Audacity.pkg
but still not able to convert to mp3. please help.

Please ensure that you have installed both Audacity and LAME according to the instructions.

Installing Audacity: http://audacityteam.org/download/mac

Installing Lame: http://manual.audacityteam.org/o/man/faq_installation_and_plug_ins.html#Mac_OS_X