Simulation of a ring in ansys (error message)
 

I am a newbie in ansys and I need some help of you guys.

I started the simulation but I got some errors:

Shell element 1 does not have a valid section ID or real constants
Shell element 2 does not have a valid section ID or real constants
Shell element 3 does not have a valid section ID or real constants
Shell element 4 does not have a valid section ID or real constants
Shell element 5 does not have a valid section ID or real constants

I am using Ansys 14 and the element is shell181 and I can't input the real constants because ansys says:
"Real constants for SHELL181 element type are no longer supported."

Why I got this errors?