Need help getting rcs to work from emacs-20.7

[Steve Kelem]

Hi. I'm having trouble getting rcs to work from inside emacs-20.7 on Win2K on a 
Pentium III.
I have rcs 5.7 installed in c:\cygwin\usr\local\bin.
I can run the rcs commands from tcsh inside cygwin.
I cannot get vc to invoke rcs from inside emacs. 
I typed C-xvi which should run "ci -l" on the current buffer.
It creates a *vc* buffer, but doesn't prompt for a comment or
respond to C-c C-c to perform the actual checkin.
I have tried tracing vc.el, and have narrowed the problem down to the
vc-do-command function.
It tries to run "rcs -V", and gets a status code of 128.
The code that searches for rcs does find
c:/cygwin/usr/local/bin/rcs.exe, so at least some of the path code is
working.

I have the following variables set:
(vc-path (quote ("C:/cygwin/usr/local/bin"))) 
(vc-command-messages 't) 
(exec-path (quote ("c:/Perl/5.005/bin/MSWin32-x86-object" 
"C:/cygwin/bin" 
"C:/cygwin/usr/local/bin" 
"C:/cygwin/contrib/bin" 
"C:/Perl/5.005/bin" 
"C:/WINNT/system32" 
"C:/WINNT" 
"C:/MSSQL7/BIN" 
"C:/Program Files/rksupport" 
"C:/Gnu/bin" 
"C:/Java/VisualCafeXE/Bin" 
"C:/Java/VisualCafeXE/Java2/Bin" 
"C:/Program Files/Common Files/Symantec Shared" 
"C:/Gnu/emacs-20.7/bin")) 

Does anyone have any idea why emacs can't execute the rcs commands? 

Thanks for any help you can give,
Steve Kelem