Error in using FUTA Software

Hi experts!
For checking payroll calculation I am using FUTA software.
When I am calculating the payroll checks then the following error message shows. I don’t know the meaning of this error. Is there any error of my inputted data or information??
Please any help.
Thanks a lot

FUTA Tax 2011
Error Line 3: 2011 FUTA base must be greater than 1
