Take atomizer off and batteries out. Connect to computer with usb cable that came with it. Download the latest SXI from pioneer4you.com. When you launch it, you'll need to click Connection first, then Install Driver. Then click the button for Start Windows 7 or Windows 8 x64 setting if your in 64 bit OS like I am. It should then pop up a box that will have your device listed. Then hit Install WCID Driver. Onest that's all done, slick the SXI logo to go back to main and choose the Upgrade button and upgrade using the IPV4 "Test" patch file. If f you don't see your IPV4 listed, (Mine is listed as SX330-V4 at first but now shows SX330-V4S) you might need to try another data cable. Other than that, I don't know what might be wrong. Maybe try a different computer. Also, I noticed neither it nor my IPV3 Li like to be connected to the USB3 port. So try and make sure you are using USB2.
