Problem with LDAP module. Any help?

Hello -

     I am trying to compile PHP 5.3.13 on Solaris 10 with ldap support.

         I have installed openldap libraries.
         I have included a --with-ldap flag in the configuration command 
that points to the installed library
         Compilation, testing and installation proceed as normal
         The php.ini includes ldap as a module and references the .so 
correctly in the extensions directory

But

         the ldap module does not show up in phpinfo() output and ldap 
doesn't work.

     I can provide configuration, compilation and testing output, but I 
can't see anything there that indicates why the ldap module is not 
making it in to the final php.

     Could anyone make any suggestion about how to debug this?

Thanks;

-- 
Garey Mills
Library Systems Office
UC Berkeley