Help with 9.4 UC2 and pam_winbind

I can't seem to get pam authentication working with informix 9.40 UC2 on linux. I'm just trying to get simple password authentication working with our server. We're using pam_winbind.so for most users Following the limited documentation I have (pam.txt) and the article posted on the IBM Developworks site about pam (http://www-106.ibm.com/developerworks/db2/zones/informix/library/techarticle/0306mathur/0306mathur.html), I added the following line to the sqlhosts file: dbmaster1 onsoctcp dbmaster1 informix_port s=4,pam_serv=(other),pamauth=(password) the pam_service in /etc/pam.d/ is called other -- it reads as follows: @include common-auth @include common-account @include common-password @include common-session It's failing to authenticate a user when I try to connect in dbaccess, and I have no idea why. Here are a few questions for any one who understands how Informix interacts with pam: 1) what log file should I be checking for the reason why this configuration is failing? I looked in online.log and /var/log/auth.log -- and see no record of the failed login. 2) what is the meaning of s=4? 3) has anyone gotten pam_winbind to work? Are there any pam gurus out there? Thanks