Don, what OS are you using?
I am using SuSE Linux 6.3 and 6.4 respectively on different machines. I cannot for the life of me get either of them to recognise a .tcl initialisation file for ACS/pg.
AolServer works great using the standard nsd.tcl initialisation file - it loads the postgres driver and everything works. When I install the ACS/pg, and use the recommended .tcl file in /home/nsadmin, it all goes to hell on me.
The /parameters/$server.tcl file that comes with the latest release works fine.