Welcome to the discussion forums,
How does it show up? Have you installed the NI-DMM driver? If not, you can find the latest driver by visiting www.ni.com/downloads » Drivers and Updates and search for “dmm”. Currently, the latest driver is 2.7.2 and is compatible with Windows 2000/XP, and Vista for the 4071.
If you have installed the driver, then will you please provide me with information about the software you have installed, such as versions of LabVIEW, Measurement & Automation Explorer (MAX), and NI-DMM?