If the problem extends to other applications, you might encounter an error with your sound driver. To fix it, visit the official website of the manufacturer and download the latest version of driver. Performing a driver fresh installation should fix the problem. If you encounter the problem only for this program, check the windows mixer to see if the application isn't muted. You can find the mixer by clicking on the volume control icon next to the system clock and select Mixer. You should have the program started while doing this, otherwise it won't show in the mixer. If you still can't fix the problem, try to update your program's version, perform a fresh installation of the product, or contact the developer for additional information on the official website.