open ldap server start up problem on red hat 7.3

["Venkat Reddy Valluri" <venkatv@quinnfable.com>]

Hi,
   
 I configured open ldap server on red hat 7.3, following instructions care fully, I am so much confident that i didn't miss any thing,
     I started sever with following command
         ./slapd -d -2048
       then i am getting problem like this
     erro=97 (Address family not supported by protocol) and it simply hanging over there with out starting server
    when i scan the ports with 'nmap' command it showing that ldap service is running on port 389,  I didn't understand why it is happening over there
    I would be very much thank full to you, if give me good solution
  Thanks in adavnce
bye
Venkat