route-me marker label with UIButtonTypeDetailDisclosure-Button - Button isn't clickabel

Question

I've got a problem with the route-me framework and marker labels. I'm trying now about 5 hours with no luck and searched almost every forum topic on the web about this. I want to add a marker label with a UIButtonTypeDetailDisclosure-Button on it. When I add the Button to the UIView that should be the label I can't click on the Button.

My code is as follows:

- (void)tapOnMarker:(RMMarker*)marker onMap:(RMMapView*)map {
    UIView *frame = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 50, 50)];
    UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    button.frame = CGRectMake(0, 0, 34, 34);
    button.enabled = YES;
    button.userInteractionEnabled = YES;
    [button addTarget:self action:@selector(markerLabelButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

    [frame addSubview:button];
    [marker setLabel:frame];
    [marker showLabel];
}

-(void)markerLabelButtonPressed:(id)sender {
    NSLog(@"pressed");
}

I hope anyone may help me with this. Thanks :)

I you need any more information please let me know!