My Basler camera is not detected by the PylonViewerApp. I connect the camera via the Ethernet port and It has a IP address but when I run the PylonViewerApp, the camera is not detected.
If you have issues with the application and cameras, then I recommend downloading the supported apps provided by the developers. I've seen some drivers as well on the page. Go to Device Manager (Start > Run > devmgmt.msc) and check to see if everything is good.
They also provide the necessary PDF files: http://www.baslerweb.com/en/support/downloads/document-downloads