Soundtaxi R & R Error

Well I used the Soundtaxi trial and of course everything worked well. After I bought the program it was all down hill from there. It will convert a few songs and then I get a must install R&Rinstall.exe message. I did that and rebooted, then I get an error saying soundtaxi is not properly installed.
Anyone have this same problem or a solution? I am using Vista Premium if that helps.
If Soundtaxi is too problematic, is there a program that is better. I would prefer one that can do folder monitoring and automatic conversion like soundtaxi does.