How do I run Battlefield 2142 in a maximized window?

I have Battlefield 2142 running in a window, but now im not able to maximize the window when I do the +fullscreen 0. I also treid the properties, run in window, maximized, minimized and full window, and that didnt work, so anyone got any idea's?How do I run Battlefield 2142 in a maximized window?
Set +fullscreen to 1

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