Hello, I have a Surface Pro with which I use the Lenk Bluetooth Wireless Keyboard. http://www.amazon.com/gp/product/B00CXTF9HU/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1 It has worked fine for many months. Recently, I charged the keyboard and when I tried to link it to the Surface, I was asked for a pairing code. I have tried rebooting but it continues to ask for a pairing code, something that was never required before. Please help me pair the keyboard with the Surface Pro. Thank you.