Are you trying to a dead device, or are you just looking to remove a screen lock ?
Using a Firehose Loader involves deep-level system access. Using the wrong version of a loader or the wrong firmware for your specific regional model can result in a permanent "hard brick." Always ensure your phone's battery is at least 50% charged and back up any data if the device is still functional. Nokia 1.4 Firehose Loader Download- - Google