How to change LDAP password via JNDI

I am trying to change the user's password via JNDI but i am getting the error below. javax.naming.directory.SchemaViolationException: [LDAP: error code 65 - Entry uid=yiwei,ou=Administrator,o=SID,dc=QuizPortal cannot not be modified because the resulting entry would have violated the server schema: Entry uid=yiwei,ou=Administrator,o=SID,dc=QuizPortal violates the Directory Server schema configuration because it includes attribute user password which is not allowed by any of the objectclasses defined in that entry]; The below is my code. ``` public class ModifyAtt { public static String INITCTX = "com.sun.jndi.ldap.LdapCtxFactory"; public static String MY_HOST = "ldap://KhooGP-Comp1:1389/dc=QuizPortal"; public static String MGR_DN = "cn=Directory Manager"; public static String MGR_PW = "password"; public static void main(String[] args) { //Identify service provider to use Hashtable env = new Hashtable(); env.put(Context.INITIAL_CONTEXT_FACTORY, INITCTX); env.put(Context.PROVIDER_URL, MY_HOST); env.put(Context.SECURITY_AUTHENTICATION, "simple"); env.put(Context.SECURITY_PRINCIPAL, MGR_DN); env.put(Context.SECURITY_CREDENTIALS, MGR_PW); try { // Create the initial directory context InitialDirContext initialContext = new InitialDirContext(env); DirContext ctx = (DirContext)initialContext; System.out.println("Context Sucessfully Initialized"); ModificationItem[] mods = new ModificationItem[1]; Attribute mod0 = new BasicAttribute("user password", "a"); mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE, mod0); ctx.modifyAttributes("uid=yiwei,ou=Administrator,o=SID", mods); } catch(Exception e) { System.err.println(e); } } } ``` Any idea why?? Many thanks in advance.. Kevin