Full_Name: nina wang Version: 2.2.19 OS: Vxworks mips URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (222.68.187.35) I remove these code from linux to gcc. a computer equipmented os win 2000 server acts as server setting up AD . i start a thread to init a ldap connection and bind them with a valid account and password,configured in server. then unbind them every several seconds. through special tools ,i can see that free memory always being decreasing. if i only do action ldap_init,without bind to server,no the said scene . THE CODE IS : { LDAP *ld; LDAPMessage *res=NULL, *e; int i; char *a, *dn; BerElement *ptr; char **vals; /* open a connection */ if ( (ld = ldap_init("192.xxx.xxx.xxx",389 ))== NULL ) return 1; if ( ldap_simple_bind_s( ld,"CN=nina wang,CN=Users,DC=ldap,DC=qtier,DC=com","0000" ) != LDAP_SUCCESS ) { ldap_perror( ld, "ldap_simple_bind_s" ); return 1; } ldap_msgfree( res ); /* close and free connection resources */ ldap_unbind( ld ); return 0; } Hope to receive your response soon. Thank you .