Haven doesn't want to run anymore after switching GPU

[replikant8]

Hello.

I've got a new laptopt that has both integrated intel graphics and a dedicated gpu card. In NVidia settings I tried to change java to use dedicated video card instead of the integrated one for better performance but after doing so haven doesn't boot up anymore. I get the black cmd screen for a split second and nothing happens. I tried Amber and another custom client based on amber, and default client. Only default client works which obviously isn't any help to me. Does somebody know what's wrong?

EDIT: SOLVED, 32 bit java was the problem, I had to manually download 64 bit version.