Can't 'startx', said 'libXfixes.so.3' not found, required by 'gnome-session'

Sir, I met problem: 1. I installed freebsd 5.3-release first, then update source tree, buildworld and install success to up freebsd 5.4-release. 2. pkg_add -r gnome2, add '/usr/X11R6/bin/gnome-sessio' to my .xinitrc file after installed gnome2.10. 3. Tried to startx, but it said

rc.conf doesn't work after FreeBSD was updated from 5.3 to 5.4

Sir: 1. I delete my src directory on 5.3-release(rm -fr) and was going to update to 5.4-release via source tree. 2. after cvsup, then buildworld, buildkernel, installkernel; finaly mergemaster, installworld on single user model. It seem everything is okay. 3. the problem happen after reboot. It