There are a few different reasons why this unit would not be functioning corrrectly.
1. Make sure to use the USB cable that came with the product to hook it up. Using a different cable can cause issues with the functionality of the product.
2. This device must be connected directly to your computer without using a USB hub. A USB hub can cause issues with the functionality of this product.
3. Other than that the only other thing that could cause issues would be your PC workload. Using to much RAM can limit the functionality of this product.