I am in England right now, where the standard residential power supply is 240V. I need to run an appliance I brought from the US ( electric velobinder GBC), which operates at 115V, 3.1A Max. I am using 240V to 120 V voltage converter, which can be used with appliances with power up to 100W. When I switch on the appliance, it produces quite loud buzzing noise but it doesn't operate as normal. What can be the problem ?