Z61m: Closing Display Lid disables second monitor

[SemiOpaque]

Hallo,

if I close the display lid when a second monitor is enabled, my ThinkPad disables the second monitor and shows the content of the closed display.

How can I tell my computer that he doesn't anything when closing the lid?

Yes, I already configured it in the control panel.

Greetings.

[fbrdphreak]

One thing I do is lock the computer (Start key + L) when I close the screen while running a dual monitor setup. This preserves things for me