I installed Labview 7.1 and NI-DAQmx 7.2, Traditional NI-DAQ 7.2 onto the pc. The PCI-GPIB/LP board is installed onto pc also. Now I connected one HEWLETT PACKARD 34401A Multimeter and FLUKE 45 Dual Display Multimeter with the PCI-GPIB/LP board through GPIB cables. And when I open MAX, I can see the two equipments listed under "Devices&Interfaces" as instrument0 and instrument1. When I use DAQ Assistant Express VI and try to configure a channel as input, I cannot find any "physical channels" available for select. I tried several instruments and the result is same: instrument is recoginzed, but cannot access it and the channels on the instruments are unavailable. I did a quick search just now. It seems that I need to download the specific instrument driver for each installed instrument and install it to take use of them? Is this the cause of the problem? Thanks~!