ram memory

Hi all, I have a Lenovo ThinkPad E440. Specs are: i7 quad-core 2.3GHz / 16 GB RAM / Windows 8.1 Pro 64-Bit / Intel HD Graphics 4600 / NVIDIA GeForce 840M I want to upgrade the RAM Memory to a 32 GB kit, with two 16 GB ones, as the laptop has two slots. But a while back I bought a kit and it...