[[BoxSDK sharedSDK].foldersManager createFolderWithRequestBuilder:builder success:success failure:failure] not working - ios

Question

I am having trouble creating a folder in box.com Here is my code. I am having trouble with foldersManager createFolderWithRequestBuilder If I breakpoint on the return I get "op = POST https://api.box.com/2.0/folders"
- (void)boxAPIAuthenticationDidSucceed:(NSNotification *)notification
{
NSLog(#"Received OAuth2 successfully authenticated notification");
BoxOAuth2Session *session = (BoxOAuth2Session *) [notification object];
NSLog(#"Access token (%#) expires at %#", session.accessToken, session.accessTokenExpiration);
NSLog(#"Refresh token (%#)", session.refreshToken);
dispatch_sync(dispatch_get_main_queue(), ^{
[self dismissViewControllerAnimated:YES completion:nil];
});
BoxFolderBlock success = ^(BoxFolder *folder)
{
[self fetchFolderItemsWithFolderID:self.folderID name:self.navigationItem.title];
};
BoxAPIJSONFailureBlock failure = ^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSDictionary *JSONDictionary)
{
NSLog(#"folder create failed with error code: %i", response.statusCode);
if (response.statusCode == 409)
{
dispatch_sync(dispatch_get_main_queue(), ^{
UIAlertView *conflictAlert = [[UIAlertView alloc] initWithTitle:#"Name conflict" message:[NSString stringWithFormat:#"A folder already exists with the name %#.\n\nNew name:", #"ezMedRecords"] delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"OK", nil];
conflictAlert.alertViewStyle = UIAlertViewStylePlainTextInput;
[conflictAlert show];
});
}
};
BoxFoldersRequestBuilder *builder = [[BoxFoldersRequestBuilder alloc] init];
builder.name = #"ezMedRecords";
builder.parentID = self.folderID;
BoxAPIJSONOperation *op;
op = [[BoxSDK sharedSDK].foldersManager createFolderWithRequestBuilder:builder success:success failure:failure];
return;
}

Answer 1

What is self.folderID?
It should be a valid folderID of the folder that exists on Box.
To save to "all files", start with builder.parentID = #"0";
BTW, what is error message that you get in your failure block?
Does failure block execute at all?
I'm talking about this line:
NSLog(#"folder create failed with error code: %i", response.statusCode);