Thank you for bringing this issue to our attention via the community.
According to Apple support article HT2801 (http://support.apple.com/kb/ht2801), Apple Superdrive can only be plugged into USB ports on selected Apple computers, but not recommend to plug to a USB hub. Below is the extract:
The SuperDrive is designed exclusively for use with MacBook Air, MacBook Pro, and Mac mini’s that do not have a built-in optical drive. The SuperDrive must be directly plugged into the computer’s USB port, and cannot be used if connected to a USB hub.
If there is anything we can do for you, you can contact us via firstname.lastname@example.org and we will be more than happy to help you out as per the 18-month warranty policy.
Sorry for the inconvenience caused and thanks for your understanding.