Hello,
I need help. My site is out!

This morning I have received this error: calenar.setup


I tried to load the new version of K2 (26.6)
but now it is stopped again with tihs error:
"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '44,11,15,20,37,38' at line 1 SQL=SELECT ordering AS value, title AS text FROM hvhgu_k2_items WHERE catid=10,44,11,15,20,37,38"
I'm nont an expert.
Some one can help me pleaee?