I have a Dell E6400, I have been using the laptop as a monitor along with an external monitor, plugged into a docking.
Now I just got a second monitor, so I want to dock the computer with it closed and use the two external monitors. I plugged one into the docking station, into the blue plug, and the other into the side of the laptop, also a blue plug. But the one plugged into the side of the laptop will not recognize, what am I doing wrong??