can't connect to ldap server (0x5B)

[venki <avenkatesh79@rediffmail.com>]

hi all

we are running openldap software to maintain our univ. students digital 
certificate.  We are successfully able to search the ldap for certs. from the 
local system but when we try from remote machine, netscape ldap client throws 
an error stating "can't connect to ldap server".

 we searched in mail archive and added some of the suggestions like
stoping ipchains, iptables services. Added lines slapd: ALL in 
/etc/hosts.allow. Still we are unable to point out the problem correctly. 

openldap is running on R.H. 7.3. Does any how have some pointers to 
figure out the problem?  Thanks in advance.

-venki

P.S : Also, in R.H their are two ldap. conf files /etc/ldap.conf & 
/etc/openldap/ldap.conf. which one will be loaded when we start
slapd by /etc/rc.d/init.d/ldap start.