Using RCS on Windows XP

[wlkjx oiuwe]

Hi,

I downloaded the packages for PC and unzipped the binaries
to a suitable place. But for the first time when I invoke a check in
command like this:

ci test.txt

It complains about "ci:
RCS/test.txt: No such file or directory". (Note the directory delimitor
is '\' rather than '/' on Windows) 

I also tried to put test.txt in a sub-directory "RCS", just like I did in Linux, but still no luck. What can I do?

Thanks for any suggestions!