mod_auth_pam giving "invalid account: Dlopen failure"

["S G" <myemailinbox@xxxxxxxxx>]

I have a Sparc solaris 9 server with apache 2.0.49 and
mod_auth_pam-2.0-1.1.1 installed. The NIS service is working fine and
I'm able to login on telnet using the NIS server. But when I try to
authenticate in httpd using mod_auth_pam I get the following error in
/usr/local/apache2/logs/error_log 
 
-------- 
[Sun Apr 02 15:20:02 2006] [error] [client 12.3.4] PAM: user 'jabba'  - invalid account: Dlopen failure 
-------- 
 
My httpd.conf has the following directives: 
-------- 
LoadModule auth_pam_module modules/mod_auth_pam.so 
LoadModule auth_sys_group_module modules/mod_auth_sys_group.so 
 
<Directory "/usr/local/apache2/htdocs/nis/"> 
 
AuthPAM_Enabled on 
AuthType Basic 
AuthName "YP login" 
Require valid-user 
 
</Directory> 
-------- 
 
My /etc/pam.conf has the following directives: 
-------- 
httpd auth required pam_unix.so.1 debug  
httpd account required pam_unix.so.1  
-------- 
 
I have struggled with this for 3 hours now. What am I missing? 
 
THANKS IN ADVANCE.
			
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