open/save RTF error

Hi everybody,
I discovered interesting error,

The easyest way to explain is:
On Windows (i triend Czech and English languages versions),
open capi applications example "Rich Text Editor" and try to save or  
load rtf file.

If fails with error:

No applicable methods for #<STANDARD-GENERIC-FUNCTION
STREAM::OS-FILE-HANDLE-STREAM-FILE-HANDLE 206FE07A> with
args (#<STREAM::EF-FILE-STREAM C:\abakan.rtf>)

I saw the it uses function WIN32::RICH-TEXT-WRITE-FILE
So it explains to me why it works perfect on Mac OS X.


I tried it on many computers and many versions 4.5, 5.0.1 and 5.1. It  
works to me only on one computer. And of course a I need it on others :)

I think somethink wrong happened to windows, because in past it worked  
every were.

Please anyone, can you help me?