Problem with CVS checkout/update

[Marooned]

Hi,

Wonder if this is the right group.

My problem is that we have a CVS repository on a linux machine and 
we use the ssh mode of authentication to access the repository.
while setting up the respository we 

1. created a user groups cvs, which had all the members who needed to
access.
2. did : chgrp -R cvs <CVSROOT>
3. chmod ug+rwx . <CVSROOT>CVSROOT (as mentioned in the manual.)
4. all the umasks are set to 000.

However, still whenever some one adds a directory to the repository,
subsequent
checkouts/updates by other members result in following error :

failed to create lock directory for `/opt/CP_IDS_CVSROOT/Docs/temp'
(/opt/CP_IDS_CVSROOT/Docs/temp/#cvs.lock): Permission denied

What is the reason for this happening?

Thanx in advance,
~Marooned