Tesla C2070 with ASUS card

I’m trying to get a system working, with an ASUS GT440 primary video card and a Tesla C2070 as a dedicated GPU (not outputting to a monitor at all).
I’m using Windows 7 x64, and have an ASUS P8P67 motherboard. It is a clean Windows install.
How do I get both cards to recognize at once? Currently I have the Tesla drivers and CUDA (4.0) installed, but my other graphics card isn’t coming up at all even in the device manager. How do I swap graphics control to my other card, so the Tesla can be reserved for CUDA and the like?

–Penn

Clarification:
The Tesla card is in the primary socket, because that’s the fastest one. The GT440 is in the secondary socket.
When I have only the 440 plugged in, it works fine and the NVIDIA control panel works.
When I connect the Tesla card as well, they both are found in the device manager, but only the Tesla outputs to video and the NVIDIA control panel fails to open and tells me: You are not currently using a display attached to an NVIDIA GPU.
CUDA works regardless.

How do I get video output through the 440 while the Tesla is connected?
Thanks.

–Penn