This is going to sound stupid but I spent all winter working on songs and everything was smooth. Suddenly, i can't get the Presonus 24C to recognize an input, an interface, or even itself. Nothing works. This is very annoying and I am on a Mac so I double double checked to make sure the preferences were smooth, but yeah. When I'm in Presonus -- it doesn't reocngize an input from either a d/i amp or a simple microphone. Irritating. I'm sure the solution is simple...