problem using 'ldapsearch'.help!

[Yanlin Peng <kamela@mail.ustc.edu.cn>]

Hi,all
	I start slapd and add entries ok. I can use 'slapcat' to
see entries I added. But I run 'ldapsearch' to problem.
ldapsearch -D "" -x -W -b "" -s base "(objectclass=*)" namingContexts
Enter LDAP Password:
ldap_bind: Can't contact LDAP server
	I just try to contact local serevr and the passwd is right.
What's wrong with it?