I experience a similar issue when I attempt to delete all of my motion events for a particular camera at once (on a 5 year old computer). The camera will often lose connection (for a minute or 2). I don't know for sure, but I think this issue is occurring because the processor usage spikes (while deleting many files/folders). If you're on a Windows computer, try hitting CTRL + ALT + DEL and viewing the Task manager (might have to click "Show processes from all users" at the bottom)...then scroll down until you see icamsource.exe. In the CPU column, you'll see the percentage of the CPU (processor) usage that icamsource is using. View it before opening the iCam app, while viewing the camera in iCam, then while trying to view your motion events in iCam. If it reaches a significant percentage (or your total CPU usage - displayed at the very bottom/center of the Task Manager window reaches 100%), that's probably what is happening. Or it could possible be a memory issue if your "physical memory" (also displayed at the bottom of the Task Manager window) is reaching 100%.
