The module used here is Mozilla::LDAP::API qw(:constant :api :ssl). Now I don't know much about this module. Please can I get some information regarding this module.

As with most Perl modules, the documentation is on CPAN.

Secondly, I am getting a "segmentation fault(coredump)" error when I am trying to run the script. Is this because the module is not properly installed.

It's impossible to tell. Is anything being written to the web server error log?

If needed I can also provide the script

What would be helpful would be a cut-down version of the program (maybe 20-30 lines) that exhibits this problem. If you post the whole thing then people might not be interested enough to read it all.