I get a File 'System:Modules.StreamMan' not found error.

I take it from here [1] [2] that StreamMan is short for StreamManager. 
And that it should be in the sharedsoundbuffer.!System folder. I 
shift+double clicked and followed !Shared.350.Modules to see StreamMan 
in this directory. The file appears present but still there is an error.

Chris


[1] 
http://permalink.gmane.org/gmane.comp.lang.smalltalk.squeak.vm.devel/9468
[2] http://www.raspberrypi.org/phpBB3/viewtopic.php?t=29504&p=278048