The connection with server is disconnected error

Whenever I get through the X-Trap loading, I get an error that says:
"The connection with server is disconnected: W[2004] L[0]"
I have an MSI GE60 Notebook. It has a Killer 2200 LAN network card, but I am running off of my schools wireless internet due to them disabling ethernet ports. I know MSI notebooks have had trouble running the game in the past. Any help would be great.

ALSO: Anyone know why my laptop doesn't seem to want to use the NVIDIA GeForce GTX 765m that is in the laptop? When I played the game at home, I would get maybe 100 fps max, and this laptop should run it at WAY more than that. I get a feeling it is running off of the intel graphics. I set the priority GPU to my nvidia card, and I told it to use the nvidia card when playing CF, and it still seems to run poorly. Thanks.

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