Unable to check out REL7_1 via cvs

Hi, I am using the following command to check out the 7.1 branch of
PostgreSQL.
cvs -d :pserver:anoncvs@postgresql.org:/home/projects/pgsql/cvsroot co -r REL7_1 pgsql

This is the error I am getting.
cvs [server aborted]: cannot write /home/projects/pgsql/cvsroot/CVSROOT/val-tags: Permission denied

I can check out HEAD perfectly alright

Anybody else seeing similar results ?

-- 
Yusuf Goolamabbas
yusufg@outblaze.com