Invisible K2 items and categories

Hello, i just download and install (quickstart) this template, but when i go to K2 i don't see any item and categories.

If I add a new item, select a category, save it .. I do not see this item also

Any solution for this?

Hi

Please send me Your joomla panel access. I can see it fine in my copy. What PHP version are You using ?

Hi

Please send me Your joomla panel access. I can see it fine in my copy. What PHP version are You using ?

PHP version is 5.3.1
What joomla panel acess???

I forgot to mention that the categories and items invisible in the administration only when i open page with Firefox. IE and Chrome works fine

Hi

I mean the access You need to type to enter /administrator part of the website.

Site is still on localhost and i acces "localhost/site/administrator"