The category list on my joomla 2.5 using k2 it does show all the articles. I mean there is no next page button . How can i add in category list te next page button?

Hi. You need to play around with the settings. Try changing the "Primary", "Leading" etc settings. They can be found on the category edit page or in the menu link.

thank you so much.. i have tried it and it works!!

You are welcome.