File names formatted like that should work. In fact, I renamed a couple of the Scourby files here to that name and re-indexed and it worked.
It must be a certain file name causing the problem. Here is a way you can sort it out.
Make another folder say Audio Temp.
Copy just one book of file to it like all 16 of 1 Cor.
Run Bible Analyzer and in Preferences go to Audio Settings/Link Audio Files and select the new folder.
Be sure Use Audio Files is checked.
Now go to 1 Cor 1: in the Bible Window and click the Start/Stop Text To Speech Button and see if it plays.
If so, add some more files to the new folder, re-index and try to play.
By the way, what audio files are you using?
Developer, Bible Analyzer
But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. (Rom 4:5 AV)