Spring RTS Engine

When I enter a multiplayer game (balanced annihilation) my courser is stuck in the middle of the screen. I can move the camera around but I'm unable to click anywhere besides the exact middle of the screen(meaning i cant build units or anything)

When I start up a single player game, for some reason, it works fine.

Thanks in advance.

Is the cursor changed to a cross (hairs) ? (And you scroll immediately, ie whichever way you move your mouse ?) That usually happens on clicking middle mouse button.
Don't know why it should happen on every gamestart though... Try clicking the middle mouse button again, that's the usual way to release the cursor back to normal. Sorry if that doesn't help.