Manuel
I'm assuming you mean that your entire system works great on your development PC, and it's your target system that has problems.
Can you tell me a little information about the setup of your development and target systems:
Operating System
NI-DAQ driver (NI-DAQmx Base 1.x or NI-DAQmx 7.5)
Programming Environment (LabVIEW, VC++, VB)
The first thing that I would do would be to verify that you have the
same version of the NI-DAQ driver installed on both systems.
Then, open up Measurement and Automation explorer on the target system
and test the USB-6008 device.
Thanks
Travis W
DAQ Enthusiast