Anneton,
Actually, the PCI-6602 is not yet supported by NI-DAQmx. The NI 660x devices will be supported in a future version of NI-DAQmx. The NI-DAQ 7.0.1 readme.html file contains a list of all the devices supported by NI-DAQmx 7.0.1.
Good luck with your application.
Spencer S.