Ralph,
I'm sorry you can't listen at the songs. All of them work fine on 3 computers I've tried so far.
The problem could be bound to the configuration of your browser. If you use MS Internet Explorer, try to save to the disk the RA file and then open it with your RA player. Here you are the steps:
1) in your browser, click with the RIGHT button on the RA file and select the SAVE OBJECT WITH NAME (or something similar - my browser is in italian) option
2) exit from your browser, lauch Explorer, find the downloaded RA file and double click (left button) on it
I do not know how to save files within Netscape Navigator, sorry.
Ciao
Ezio