This is probably an installation problem. If the 1.5 driver installed properly, you should find the file imacfgui.mxs in the following directory: Program Files>>National Instruments>>MAX>>UI Providers. If this file doesn't appear, the installation did not complete successfully. One easy solution that typically works is to search for the IMAQCFG.msi on the installer CD. If you run this, it should fix the problem. If this still fails, go through the complete reinstall.