The DeLock USB adapter are so poorly made that they were basically unusable. The plug-side (mini USB) is ok, but the socket (Micro USB) has certainly not the outer form of a Micro USB connector. Therefore, the guesswork begins with the attempt of fitting together. If you're unlucky, then ending in a wrong way inserted USB connector. With a little more luck guessing although the right direction, but still the plug only fits into the socket so bad that he a) hardly finds support and b) no electrical contact is. Result: No function!
Better buy here: Lindy USB Adapter type USB 2.0 Micro-B F / Mini-B M - Cable, 71235