UITextAutocorrectionTypeNo não funcionou para mim.

Estou trabalhando em um aplicativo de palavras cruzadas para o iPhone. As perguntas estão em UITextViews e eu uso UITextFields para a entrada do usuário de cada letra. Ao tocar em uma pergunta (UITextView), o TextField da primeira resposta char se torna FirstResponder.

Tudo funciona bem, mas os UITextViews ainda estão com verificação ortográfica e marcam as palavras erradas na pergunta, mesmo que eu as defina UITextAutocorrectionTypeNo.

//init of my Riddle-Class

...

for (int i = 0; i < theQuestionSet.questionCount; i++) {

    Question *myQuestion = [theQuestionSet.questionArray objectAtIndex:i];
    int fieldPosition = theQuestionSet.xSize * myQuestion.fragePos.y + myQuestion.fragePos.x;
 CrosswordTextField *myQuestionCell = [crosswordCells objectAtIndex:fieldPosition];
 questionFontSize = 6;
 CGRect textViewRect = myQuestionCell.frame;

 UITextView *newView = [[UITextView alloc] initWithFrame: textViewRect];
 newView.text = myQuestion.frageKurzerText;
 newView.backgroundColor = [UIColor colorWithRed: 0.5 green: 0.5 blue: 0.5 alpha: 0.0 ];
 newView.scrollEnabled = NO;
 newView.userInteractionEnabled = YES;
 [newView setDelegate:self];
 newView.textAlignment = UITextAlignmentLeft;
 newView.textColor = [UIColor whiteColor];
 newView.font = [UIFont systemFontOfSize:questionFontSize];
 newView.autocorrectionType = UITextAutocorrectionTypeNo;
 [textViews addObject:newView];
 [zoomView addSubview:newView];
 [newView release];
}

...

//UITextView delegate methode in my Riddle-Class

-(BOOL)textViewShouldBeginEditing:(UITextView *)textView {

     textView.autocorrectionType = UITextAutocorrectionTypeNo;  

     for (int i = 0; i < [questionSet.questionArray count]; i++) {
      if ([[[questionSet.questionArray objectAtIndex:i] frageKurzerText] isEqualToString:textView.text]) {
        CrosswordTextField *tField = [self textfieldForPosition:
            [[questionSet.questionArray objectAtIndex:i] antwortPos]]; 
        markIsWagrecht = [[questionSet.questionArray objectAtIndex:i] wagrecht];
        if ([tField isFirstResponder]) [tField resignFirstResponder];
             [tField becomeFirstResponder];
        break;
      }
 }
 return NO;
}

Eu não chamo UITextView em nenhum outro lugar.