Whisk attachment for milk frother Mia (for frothing)

The motor does not run long enough when the whisk attachment is inserted into the Mia milk frother; it stops after a few seconds. The flat whisk that came with the device works better. It seems that the newly purchased whisk (zum Aufschäumen) is too heavy for the Mia milk frother. Overall, the new purchased attachment does not work properly. I did't return it because was 5€. I will cost me more to spend my time going to the post office and the shippping cost.