The K2 category not working

I use BOX template
The category not working, They pop up this messages

" Strict Standards: Declaration of K2Element::render() should be compatible with JFormField::render($layoutId, $data = Array) in /public_html/administrator/components/com_k2/elements/base.php on line 25 "

I setting on category , then view that page online is not working with me setting.
I try to download and make new test site it have same problem.
please help
Thank you

Hi

"Strict Standards" message is not causing any problems in functionality, so I do not think it's a cause of it. Please tell me the url to the page You have this problem on and send ma an access to joomla panel.

http://www.similan-islands.co.uk
Category and items will see that message on "Display Settings"
an access to joomla panel
user : admin
pass: admin

Hi

I'm afraid access is not working, which is good, since it's a public forum and everyone would have an access to Your site now. Please send correct access via forums PM.