why my Reformatted Windows XP sp2 won’t connect to LAN?

Hi guys! I need help, I know this might have already been asked but all the fix i have read so far hasn’t worked yet. first things first. I have 2 laptops and both uses the same cable(i interchange them). this network is shared in the whole building and the caretaker says that you only need to plug this and it should work. Well both were working back then.

But I had to reformat one and after doing so It just won’t connect. I have updated the network driver but to no avail. It only shows “Network Cable Unplugged”. I don’t know what else to do here. thanks