Why Windows client can connect openldap server?

[ê°ÁÁ <zang@whu.edu.cn>]

The program works well in Linux,But when I transplant it on Windows2000,include<Winldap.h>,use Wldap32.lib,meet "ldap_bind error",the error No. is 51:LDAP_SEVER_DOWN,it cannot contact the ldap server.The code is like followed:
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LDAP *ld;
 LDAPMessage *result, *e;
 char **vals;
 char *dn="cn=Manager,dc=ee,dc=whu,dc=edu,dc=cn";
 char *pw="secret";
 char filter[30];
 char str[20];
 ULONG i;
 strcpy(filter,"(telemailnumber=100001)");

 
      if((ld=ldap_init("192.168.1.109",LDAP_PORT))==NULL){
          MessageBox("ldap_init failed!");
          return NULL;
      }

      if(i=ldap_simple_bind(ld,dn,pw)!=LDAP_SUCCESS){
          MessageBox("ldap_bind error!");
         	  sprintf(str,"Error No. is %x",i);
		  MessageBox(str);  return NULL;        //Only get here!
      }
      if(ldap_search_s(ld,"dc=ee,dc=whu,dc=edu,dc=cn",LDAP_SCOPE_SUBTREE,filter,NULL,0,&result)!=LDAP_SUCCESS){
          MessageBox("ldap_search failed!");
          return NULL;
      }

      if((e=ldap_first_entry(ld,result))==NULL){
		  MessageBox("Find no entry!");
           /* there was no entry match the input number,so it's invalid */
      }
      if((vals=ldap_get_values(ld,e,"voicemailstore"))==NULL){
          MessageBox("ldap_get_values failed!"); 
         return NULL;
      }
      

//      strcpy(wavpath,*vals[0]);
        ...............
     
     /* free ldaps   */
      ldap_value_free(vals);
      ldap_msgfree(result);
      ldap_unbind(ld);
_______________________________________________________________________________________
Is there any incompatible with windows ldap client SDK?
How can I resolve it?
            zang@whu.edu.cn