Adding note to customer

Hi,

I am trying to adding note to customer but getting permission problem :

[Error]: [Code=INSUFFICIENT_PERMISSION] Permission Violation: You need  the 'Lists -> Notes Tab' permission to access this page. Please contact your account administrator.

Here is the code which I written for adding note to customer record.

     public void addNote() throws RemoteException, ExceededRecordCountFault, ExceededUsageLimitFault,              InsufficientPermissionFault, InvalidSessionFault {          // This operation requires a valid session          this.login(true);          Note note = new Note();          note.setTitle("Title from web form");          note.setDirection(NoteDirection._incoming);          RecordRef noteType = new RecordRef();          noteType.setType(RecordType.noteType);          note.setNoteType(noteType);          note.setNote("Test comment here");          RecordRef customer = new RecordRef();          customer.setInternalId("26772");          customer.setType(RecordType.customer);          note.setEntity(customer);            WriteResponse response = null;          try {              // Invoke add() operation              response = _port.add(note);              // Process the response              if (response.getStatus().isIsSuccess()) {                  _console.info("nThe following note was added successfully:" + "n  key="                      + ((RecordRef) response.getBaseRef()).getInternalId());              } else {                  _console.error("The note was not added:", true);                  _console.error(getStatusDetails(response.getStatus()));              }          } catch (Exception ex) {              if (response == null)                  _console.info("No