fourthwall

Ok, so I went through the 4 different threads that all seem to link each other in search of an answer but to no avail. The question of what one does when they receive the error message "No codec found for requested input type" was never answered. I understand how to change the path names for the files so that you can play them, but in order to write them to a CD I have to decompress them in Miles. Any attempts to do so are met with the above error. Is there a codec somewhere that I simply have to download and drop into Miles? Multiple searches and forum sweeps have revealed nothing to answer this question.