Sorting not working anymore

I have Endnote X7 on Mavericks and it was working well until it suddenly stopped being able to sort references. I tried sorting using the menu and using the bar at the top of the library, but nothing works. Has anyone ever had that issue? Restarting the software has not made any difference. 

I have the same problem- search also is not working

me too please anyone can help here  :mansad:

thanks in advance