su to root not prompting for a password

[James Riendeau]

I upgraded to 6.1 RC-1 from 5.4, and when I su to root, it's not  
prompting for a password.  I created a new account, and it does the  
same thing there.  If the user is in the wheel group, it drops to the  
# prompt.  If not, it echos the BAD SU attempt error message.  I  
think it has something to do with PAM, but the documentation is not  
exactly written for those of us who don't have MS/Ph.D.'s in computer  
science.  Does anyone know how to fix this?  I thought I followed all  
the directions in /usr/src/UPDATING, but I must have done something  
wrong, probably while using mergemaster.

My apologies if this has already been asked, but the search function  
on lists.freebsd.org won't let me access other search result pages  
beyond the first, and google didn't help.

Many thanks,

James Riendeau
MMI Computer Support Technician
1300 University Ave
Rm. 436, Dept. of MedMicro
Madison, WI  53706

Phone: (608) 262-3351
After-hours Phone: (608) 260-2696
Fax: (608) 262-8418
Email: jtriende at wisc.edu