Motion Tracking?

Our aim is to realise a camera tracking system with four cameras.
We use a capture card by ELTEC p3i_sec with four inputs.
Additionally to the card driver, there is a special DirectShowFilter software which should allow 4V to detect the capture card as a device.

4V does detect the card as device and it is possible to switch between the four video inputs, but there is no real video input, there is only a black screen.

If I use the configuration tool that is provided with the card, the video input is perfectly alright.

There seems to be a problem between 4V and the DirectShowFilter.
Does anybody have experience with that kind of problem? Any hints would be more than welcome!