External Audio files inserted inmy Library - cannot access when trying to create closed caps?HELP

jschulte5886

I am using WellSaid Labs for their audio voices. Inserting the Mp4 file into Lectora is easy and can save them in My Library. When I go to create the closed captions - text to speech feature, I cannot locate the audio files, even tho the lecrtora directions say to put these files in MyLibrary - there is no way to insert them when trying to use the closed captions feature. How do we do this?