Yes, I can help you with this issue. It seems that the B-DJ program is not recognizing the BCD2000 controller even though it is already connected. There could be a few reasons for this. First, make sure that the controller is properly connected to your Windows device. If it is connected correctly, try restarting both the program and your computer. If the issue persists, you may need to check for any available updates for the B-DJ program or reinstall the software. Additionally, you can check the program's user manual or reach out to their support team for further assistance.