Hi and welcome,
this sounds for me like the besweet.exe and maybe other files are in the wrong directory - see as the batch goes
1. call besweet (which should create a log-file at the end of its transcoding)
2. show logfile with notepad
ergo: no transcoding happens, notepad opens a empty file
check your folder settings again -> see the readme files in the besweet/besweetGUI archives