Problems when using U-Mix controller

Can anyone help I am having probs when I use my U-Mix 2 controller.
When playing music and using controller I get what I can only describe as a moment of silence, is this because my laptop is too slow?
It has 4gb ram and my Processor is Celeron(R) Dual-Core CPU T3500 @ 2.10GHz, 2094 Mhz, 2 Core(s), 2 Logical Processor(s).
When playing music and using controller I get what I can only describe as a moment of silence, is this because my laptop is too slow?
It has 4gb ram and my Processor is Celeron(R) Dual-Core CPU T3500 @ 2.10GHz, 2094 Mhz, 2 Core(s), 2 Logical Processor(s).