Presonus Audiobox 44 VSL and Windows 7--want to output 4 channels

[MemorytreeKM]

Good afternoon

First time poster here...

We just purchased an Audiobox 44 VSL for the company I work for. We need to have 4 separate channels of audio running out of the box at the same time.

For some reason, Windows 7 (and we found the same on Windows 8), will only let us select 1/2 OR 3/4, not all at the same time. Is there an easy way to link these together?

I've used other cards in the past, and they typically let you pick the device and then route the output in the software, but this seems to only allow 2 channels at once

any help would be great

thanks,