continuing with the same problem, I can not see the categories on the frontpage, if I choose only one category, if this occurs, but if I choose more than 1 page is blank.

Help please, thanks

Hi. A blank page indicates an error. Please turn on error reporting in Joomla! configuration and see what error are you getting.

Thanks, I have never used this option but I turned and there is no error, just run the code, the code is a bit long to put it here in the forum.
I completely uninstalled joomla and I have a clean new install, only have the component k2 and continue with the same problem.

Sorry my bad english