Input Steel Properties in Abaqus

Hi,

I am trying to model a reinforced concrete element in Abaqus. I have been running a couple of models for a few weeks. Recently, I tried to validate an new experiment but ran into this error, "The Plastic Strain At First Yield Should Be Set To Zero". For my steel material model, i used elastic = 29520ksi and for the plastic, i keyed in the yield stress followed by the plastic strain. At the first input, plastic strain is zero for the initial yield stress. 

I really do not know what is wrong. According to Abaqus, that is how you key in the yield stress and plastic strain. I have attached an excel sheet and a pdf showing the error screen. Hope someone can kindly advise me. Thank you.

With Regards,

Joseph