After upgrade to 12, Plesk Panel have problems to do any change, file permissions?

[ChrisKMEX]

Hi,

If want to do a change in hosting settings for a domain, or change something on the domain by the plesk panel, always I got an error like this:

Error: cannot create file: Permission denied: "/var/lock/lmlib/container_locks/root/client.1/subscription.4.lock"

So I need to manually delete the file, change the owner and put 777 mode, so it work, but it´s annoying, any ideas? please!

(the chown is psaadm:lock-manager)
CentOS 5, panel 12.08