I wanted to increase the range of my Microsoft wireless keyboard and mouse. I bought a USB extension cable (16') to plug in the receiving end of the wireless. It does a terrific job of extending the range. However, when the PC goes into sleep mode, I can't get it to "wake up" with the keyboard or mouse anymore. I'm sure it has something to do with the extension cable. I had no issues prior to adding the cable. Anyone had a similar experience?