Cordless Keyboards Interfering With Each Other

[Ratface]

Hi Guys!

I've got 2 logitech cordless mice and keyboards in the office at work and everytime they are used at the same time they interfere with each other. The mice jump around the screen, letters get missed out of words or stream across the screen. All batteries are new, I've downloaded the latest driver from logitech, the sensors are nowwhere near other electronic devices or each other and there is a clear line of sight between keyboard and sensor. But the 2 keyboards do face each other (it also happens when i move one keyboard to the other side of the room so that can't be it). The box says that other cordless devices don't interfere with them and i can't find any options to alter there frequency.

Is this common?
Any ideas how to solve it?
Have I got a couple of dodgey sensors?

Any help would be greatly appriciate 'cuz it's fryin my swede!'

cheers

Ratty

[Ratface]

Looks like i've got my answer, a mate just told me all the equipment is supposed to be a minimum of 10ft away from each other and mine are just 2ft. Oh well, back to the old corded hardware then.