I have authentication through ldap in my network and am using fedora core1

Problem is that whenever the users get logged in, the ownership of the corresponding file(s) in /dev/pts/ becomes
But i want it as

Since users get an error when using the mesg command
"mesg: error: tty device is not owned by group `tty'"

tty group does exist in this sytem.
Can anbody please suggest what action i can take to do the above(or happen automatically) at login time.
Thank you.

p.s. Can you suggest some docs to read about for the files in /dev/pts