exporting

i am using mac osx 10.7.2, when i go to export my tracks to mp3 format i get a error message saying “could not locate target file for writing” i do not know what to do. i have already downloaded the LAME softwear to write the mp3 files and selected the folder for it to export to. Help would be appreciated.

Don’t use punctuation marks in your filenames. No dates. Today is 20130103.
Koz