Is it possible to use a second network card for Labview

[Richard Kurvers]

I have a XP system with Labview 7.1 and 2 network cards.
One card is for connecting to our local network and WWW.
The other card I want to use is for communicate with a testtool.
I communicate with this testtool by means of UDP.
When I use the testtool through the local network card, it works fine.
But, when I use a second card for it, it refuses to communicate.
Can someone help me?