HiI have been trying to disable under every article box with user info... I have checked all category parameters and disable option show author but it is still displaying....I hope I make sense (I have attach image)

In the category your K2 items is assigned to, go to the Item View Options, look at the bottom for Author Options and disable or hide them all. Check you K2 item Item View Options and be sure they are set to inherit. This should work.
There are other ways to do it with k2 template overrides but it shouldnt be necessary

tnx, I havent seen that before... sorry for stupid question

Not a stupid question...there are lots of paramaters, and inheritance can get confusing