Originally posted by jezuit 60 many thanks Avant, maybe it is a misconfiguration, maybe it is a camera fault? but if one has not had problems using off camera flash via adapter, cable , and now wireless mode is giving one headache, then yes cable and adapter falls into the category of stick with what you know.
But the thing is that wireless flash is so simple to use that everything should work right out of the box, unless you have messed around with the settings. Just make sure you have upgraded your K10D firmware (ver 1.00 does not work, you need ver 1.10 to ver 1.30), set both to wireless and fire away.
If it still does not work, read up on the manual about setting channels and slave mode - but you shouldn't have to unless you have changed them accidentally in the first place. Why spend more money if you don't have to?