You need to provide some additional information. For example, what hardware interface aer you using - GPIB, RS-232? Exactly what dll's were missing? It is never a good idea to just copy something. You need to run the correct installer. For example, if you use GPIB, you would need to run the installer for NI-488. If you use VISA, you would need to install the NI-VISA run-time. Since LabVIEW 8, the app builder included the option to create an installer that included all of the hardware drivers and MAX configuration.