[plt-scheme] Problem compiling with mzc...

I'm trying to create a redistibutable package, and when compiling with 
mzc I get the following error:
     get-module-code: cannot use extension file; "c:\\program 
files\\plt\\collects\\srpersist\\private/compiled\\native\\win32\\i386\\srpmain.dll"

I want to create set of files which can be moved to another computer, 
and still be run.
Anybody have any ideas?

Thanks

Rian Douglas