Without any more specific information only the most general answer can be given. The error comes up bacause an expected .OCX file is 1) Not installed 2) Installed in the wrong place 3) Is not registered or simply 4) the computer wasn't reset after installing if requested. So try restarting your computer. If that doesn't work, uninstall then re-install LogixPro. If you still get it and this is all the info in the message then give the guys at LogixPro a call.