I'm very frustrated. I've tried many times to upgrade my firmware to 1.047 using a USB flash drive but I can not get the outdoor panel to recognize the USB drive. I insert but it does not "see" it. I spoke to Intellicenter technical support and they said to use a 4GB to 8GB drive so I bought a new 4GB drive and no success, same issue, flash drive is not seen. Previously I had tried a 2GB flash drive and had the exact same problem. I also tried to upgrade the indoor panel, I was successful so my flash drives can be seen inside but now I have a mismatch error as the indoor panel is on 1.047 and the outside is on 1.040. I've reformatted drives using FAT32 and that has not helped. The USB port does have power. I've cleaned the inside of the port and lightly sanded the thinking moisture may have caused the port