Invalid library 'ldap.so'

Hi everyone! I'm working with an Apache2 server and PHP4 inside a Red Hat 9. I have compiled and added my own PHP libraries as shared objects without any problems, but now I need to add the Ldap library. I 've tried to compile it in two ways, first as a static module inside the PHP binary file, and the second one as a shared object, but in both cases I've got some problems. If I try to use it as part of the PHP binary file, the ldap library runs ok, but my PHP libraries do not work!!! It's strange because when I load the libraries ( dl(...) ) there are no errors, but I can not use them... Do you have any idea about what can be the problem? I'm sure that my php.ini is ok, I mean, the extension-dir points to the correct directory....( phpinfo() ) My second choice was to compile it as a shared object. I did it with the phpize tool (./configure, make and make install), and with the php configure script, but in both cases I obtained the same result: a not valid "ldap.so". My command was this: ./configure --with-apxs2=/home/ivanf/local/apache2/bin/apxs --with-config-file-path=/home/ivanf/local/php --prefix=/home/ivanf/local/php --with-ldap=shared and the error shown in my browser: Warning: dl(): Invalid library (maybe not a PHP library) 'ldap.so' in home/ivanf/local/apache2/htdocs/php/AD.php on line 8 My AD.php is as simple as the following... <body> <?php dl("ldap.so"); echo "<H1> Pagina de pruebas...</H1>"; $ds=ldap_connect("ldap://192.168.7.105"); ?> </body> Please, could anyone help me???? My bests regards in advance!! Thank you! Ivan

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