i purchased a Scan EZ8000 Black Wireless Multimedia/Office/Gamer Keyboard + Optical Mouse with my new computer but as of yet hav not been able to get the keyboard to work and have been working form a corded one. i dont seem to be able to turn the keyboard on is there an on off switch or something cos i cant work it out its got BRAND NEW batteries and i press the buttons and nothign happens hit caps scoll and num loc kand no lights come on can anyone help me with this. the mouse worked fine btw.