CVS Checkout Fails But Module Exists

[Bryan Batten]

I recently upgraded from Debian squeeze to wheezy and converted from 32 
bit to 64 bit operation. In the process CVS went from 2:1.12.13+real-9 
to 2:1.12.13+real-11. I now have a strange problem with the checkout 
command.

To illustrate, there's a file in my home directory called FTPsites that 
I added to my local repository six years ago. Things have been fine 
since then till now.

Now, if I do "cvs co -p FTPsites" I get the message "cvs checkout: 
cannot find module". However:
"cvs stat FTPsites" gives me the CVS status for that file.
"cvs log FTPsites" gives me the log entries for that file.
"cvs up -C FTPsites" creates .#FTPsites.1.1, then retrieves the file.
"cvs up FTPsites" will respond with "M FTPsites"

I've tried rolling back to the squeeze version and changing 
architecture back to i386 from amd64, but the problem persists. I'm 
pretty sure I have some weird environmental violation, but can't figure 
out what it is. All levels of my local repository are writable, and 
every command I use - except for checkout - appears to work.

I even went so far as to read the directions, but so far the last week 
of googling and trying various possibilities hasn't helped, so ...

Hail Mary! and thanks in advance
--
Bryan
-
Basically, if I've stopped walking, you can pretty much tell I'm 
chewing gum.