Dear K2.
I have problem with k2 tools calendar module.
with clicking with any day, it return back to same index page with out showing result for this page.

thank you for answering

Which version of K2 and Joomla! are you using?
Any other major extensions?

Also is your index page displaying the component or is it only displaying modules?

Hi thank you for replaying.
I'm using k2 v2.5.7
joomla: v2.5.22
I can't update k2. with updating I receive this error:
Update path does not exist
Error updating COM_INSTALLER_TYPE_TYPE_.

@Alan

Check your browser console for any javascript errors. We cannot provide support for such an old version of K2. Probably something is wrong with your server setup that does not allow you to update K2. Check the directory permissions in Joomla! information page.