nope still nothing from keyboard

not even the battery or power leds are lighting up. the batteries are all brand new duracell plus straight out the packet and mouse and receiver are working perfectly but my keyboard just refuses to play ball and do anything at all.
i have taken the batteries out and replaced them and even checked and double checked that all the batteries are in the correct way yet it still sits there as dead as a doornail
i know remember why i always hated all this wireless c**p
any other suggestions will be greatly receieved before i throw it against a wall and then straight outta the window
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as for the manual .
thats as much use as a chocolate fireguard
totally useless
all it says is insert batteries and push any key and all should work fine except hotkeys which are done with cd