When I plug my Corsair 8 GB Flash Voyager and I select Speed Up my System the Readyboost tab is missing. I know this drive is Readyboost capable. It was so in Vista. Also when I look in services.msc There is NO Readyboost service listed. Ive googled and cant find resolution to this. Am using Windows Ultimate x64 with 4GB memory. Any suggestiions?