The NI support engineers tried to help, but this was never resolved. I even tried Lookout V6, but the same results. All of the OPC "test" or "explorer" programs worked fine, but Lookout did not like the Woodhead card I was using for communicating to an AB PLC. In the short term, I tested and used a Software Toolbox program that could communicate via OPC and log to database using a text file and eventually came into possession of a version of Intellution iFIX and the OPC connectivity was relatively easy to set-up. The Software toolbox software had issues with Windows 2000 on the PC at the time, so I did not use the database option for logging data to an Access database; the text file was easy to setup for what I was collecting data on. Let me know if you have any questions and I will try and help.