hi
I installed on k2 joomla 2.5. Everything works perfectly, but I have problems in front end. In fact, when I want to create an article if I click on "browse server" to insert a picture or "add field attached" to insert an attachment, nothing happens. How so?
Can anyone help?

Do you have the appropriate permissions to access the folder from the front-end? Have you properly setup the K2 User group's permissions?