Error with pam_stack.so when installing SnapManager.

Issue

When installing SnapManager we get the following errors:

In /var/log/messages:

2012-10-08 12:58:12,089 [main] [DEBUG]: SMO Server is running on port 27314 with pid 384 from directory /opt/NetApp/smsap
2012-10-08 12:58:12,090 [main] [INFO ]: SMSAP-17111: SnapManager Server started on: https://aep.weiland.rio:27314/smsap_v9/services/SMO
2012-10-08 12:58:12,090 [main] [INFO ]: SMSAP-17101: SnapManager Server internal RMI registry started on port 27315.
2012-10-08 12:58:14,491 [btpool0-2 - /smsap_v9/services/SMO] [DEBUG]: authenticate: User 'root' NOT granted access
2012-10-08 12:58:14,492 [btpool0-2 - /smsap_v9/services/SMO] [DEBUG]: Authentication message from OS: 'Module is unknown'
2012-10-08 12:58:14,492 [btpool0-2 - /smsap_v9/services/SMO] [ERROR]: SMSAP-20122: Authentication failed for user: "root" on host: "aep". Reason: Module is unknown

In /var/log/secure:

Oct  8 13:36:18 aep java: PAM unable to dlopen(/lib64/security/pam_stack.so): /lib64/security/pam_stack.so: cannot open shared object file: No such file or directory
Oct  8 13:36:18 aep java: PAM adding faulty module: /lib64/security/pam_stack.so