When I try logging into client it says:

login as: somuth
somuth@10.209.37.77's password:
Last login: Tue Jan 19 21:45:17 2010 from 10.209.37.146
id: cannot find name for group ID 505
[somuth@389-Client1 ~]$
[somuth@389-Client1 ~]$

any idea what could be the issue?