Beginning at Step 9 of [guide|143290|this guide|new_window=true] you can see the battery data cable. Make sure that this was transferred over from the original battery to the replacement battery correctly. If this cable isn't properly installed the system will not recognize the battery properly. If you're certain that the battery data cable and the rest of the battery is installed correctly, then I would operate under the assumption that the battery you installed is faulty. Good luck!