It's an official Apple keyboard purchased from Apple Store. When I plug my iPhone (and no, it's not because it's an iPhone that it's not working. Same pin connector, same software) into it, around 30 seconds later it just pops up saying "This device is not optimised" or something. If I unplug it and plug it back in, though, it does exactly the same 30 seconds later..

Suggestions?

View the original article here