failed to create lock directory

[conquer]

hi:)
after i login cvsserver successfully. i want checkout somefiles.
it report that :
cvs server: failed to create lock directory for `/home/cvsroot/myproject' 
(/home/cvsroot/myproject/#cvs.lock): Permission denied
cvs server: failed to obtain dir lock in repository 
`/home/cvsroot/myproject'
cvs [server aborted]: read lock failed - giving up

myproject was been imported to repository on cvserver ,and i am as root 
user. i use -d:pserver:address@hidden:/home/cvsroot login  to server.
if i must import files from client? or import files on server as cvsroot?
cvsroot is a user on server.