Moved to new host, now K2 pages do not work,

I tried to upgrade to new version of K2, the pages opened, but I lost all my templates and formats. Is there anyway to upgrade K2 without losing formats?

If you made changes to the core files of Joomla or K2 and upgrade the software you will loose your changes, when you move a site directly you should not loose your changes. Changes should be made by using overrides. Check the two servers and see whats different about them, Also check the k2 and joomla information tabs to see if anything is turned off on the new server