Beta patch won't load on start?

[rocu 24]

This isn't a big problem from me since I can run the game smoothly with Six Launcher but I still want to run it from steam so I could shift+tab.

So the problem is, when I run the game from steam (right click on OA->Run combined operations) then it runs combined operations with DayZ, but not the beta patch.

How could I fix this?

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When I add this to launch options:

"-mod=@dayz -mod=Expansion\beta;Expansion\beta\Expansion -nosplash"

I get the following error:

Error creating Direct3D 9 Graphical Engine