JAVA ldap error NO_OBJECT

I'm in trouble with this error when I change a password or update user's info. I've tried so many codes that are similar each others, but I still got the error. The problem can be a bad CN definition, but should be correct in my case and I'm really sad about this because I cannot face the problem.

• Connection to the server via LDAP: OK.
• SSL and cacerts: OK.
• Add user via code: OK.
• Fetching all users info: OK.
• Update user's info: BAD.

Here is a simple code where I try, without success, to update the user's info (description). The user "batman" obviously, exists in AD.

public class ADConnection {

DirContext ctx = null;
String baseName = ",OU=SoftwareV3,OU=SOFTWARE,DC=SOFTWAREDEV,DC=LOCAL";
String serverIP = "192.168.10.45";
boolean ssl = true;

public ADConnection() {
    try {
        Hashtable ldapEnv = new Hashtable(); 
        ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY,             "com.sun.jndi.ldap.LdapCtxFactory"); 
        if(ssl==true)
        {
            ldapEnv.put(Context.PROVIDER_URL, "ldaps://192.168.10.45:636/dc=softwaredev,dc=local");
            ldapEnv.put(Context.SECURITY_PROTOCOL, "ssl");
        }
        else
        {
            ldapEnv.put(Context.PROVIDER_URL, "ldap://192.168.10.45:389/dc=softwaredev,dc=local");
        }
        ldapEnv.put(Context.SECURITY_AUTHENTICATION, "simple"); 
        ldapEnv.put(Context.SECURITY_PRINCIPAL, new String("softwaredev" + "\\" +     "superadmin"));
        ldapEnv.put(Context.SECURITY_CREDENTIALS, "passw0rd");  
        ctx = new InitialDirContext(ldapEnv); 
    } 
    catch (Exception e) { 
        System.out.println(" bind error: " + e); 
        e.printStackTrace(); 
        System.exit(-1); 
    } 
}

public void updateDescription(String username) {
    try {
      System.out.println("updating...\n");
      ModificationItem[] mods = new ModificationItem[1];
      mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE,
        new BasicAttribute("description", "batman_description"));
      ctx.modifyAttributes("CN=" + username + baseName, mods);
      System.out.println("update successful!!!");
     }
      catch (Exception e) {
        System.out.println(" update error: " + e);
        System.exit(-1);
      }
  }

public static void main(String[] args) { 
    ADConnection adc = new ADConnection(); 
    adc.updateDescription("batman");
    } 
    }

ERROR: update error: javax.naming.NameNotFoundException: [LDAP: error code 32 - 0000208D: NameErr: DSID-0310020A, problem 2001 (NO_OBJECT), data 0, best match of:

The crash is on the 6th line of code in the function updateDescription. Any suggestions?