CVSROOT problem

[Romo]

Here's a recurrent problem I've had for months, I haven't been able to
fix it even after looking at many CVS forums, faqs and such.

I've setted up a CVS server on my computer that works fine using :

cvs -d /usr/local/cvsroot COMMAND

but when I do (shell is bash) :

$ export CVSROOT="/usr/local/cvsroot"
$ echo $CVSROOT 
/usr/local/cvsroot
$ cvs update
/usr/local/cvsroot: no such repository

Whatever I put under CVSROOT, the result will be the same :

$ export CVSROOT="/falbala"
$ echo $CVSROOT 
/falbala
$ cvs update
/usr/local/cvsroot: no such repository

The "*,v" files are under /usr/local/cvsroot/MODULE/.

So how to make cvs use my CVSROOT variable ? Anyone has the same
problem.