Error 403 while uploading aws S3 . net

Question

Just Set up user permissions on S3 and everything worked perfectly!

I’m building a function to upload images in the S3 service from Amazon but I’m having a 403 error, there is some additional configuration I should do in my S3?

            TransferUtility fileTransferUtility = new TransferUtility(code, keyCode, Amazon.RegionEndpoint.USWest2);

            var uploadRequest = new Amazon.S3.Transfer.TransferUtilityUploadRequest();

            string filename = File.FileName;

            uploadRequest.InputStream = File.InputStream;
            uploadRequest.BucketName = "kasne";
            uploadRequest.Key = filename;
            uploadRequest.StorageClass = Amazon.S3.S3StorageClass.ReducedRedundancy;
            uploadRequest.CannedACL = Amazon.S3.S3CannedACL.PublicRead;

            //faz o upload.
            fileTransferUtility.Upload(uploadRequest);

            return filename;