CVS DIFF problem

[Gyetvan Andras]

Hi All !

Maybe this is not the best place, where I should ask question, so if 
this is the case please drop me a mail where should I go ! :-)

So I have a problem with CVS DIFF. If I ask query update "cvs -n update 
xyz.txt" I see the changes "U xyz.txt", but when I diff the working dir 
with the repository the diff says that the two files are identical.

These are the steps that I did to create the CVS repository :

- I've installed Linux on a PC box (Red Hat 8.0)
- I've created a cvs user and a cvs group.
- I've created /cvs directory and set the owner and group to cvs 
- I've  changed the file mode to add write permission to the group
- I've created some user and put them into the cvs group
- I've set the CVSROOT variable to /cvs (I've put this to the 
/etc/bash_profile, so it should be system wide)
- I've initialized the repository as cvs user with "cvs init"
- I've import a new directory into the CVS as a normal user (who exist 
in the cvs group)

So now I can check-in, check-out, query the directory, I see the status, 
log, etc, but the diff doesn't work as I excep.

Any help is very welcome !

Thanks,
Andras