I had installed phpBB3 on a temp directory as http://temoindemont.org/~temoinde/salvationway/temp
And it is working.
I have a new parent directory for it at http://www.newworship.info
I transferred the phpBB3 files from public_html/salvationway/phpBB3 to public_html/newworship.info by following these steps using my updated FileZilla.
1) I queued the phpBB3 files from public_html/salvationway/phpBB3
2) I processed ALL the files in the queue to public_html/newworship.info
When I tried to open the forum I got Index of/phpBB3 See attached