Difficulty Encounted for Implementing A Simple FPGA Design

I am learning FPGA through online training from ALTERS

As a part of on line training i tried to implement the "How to Begin a simple FPGA Design".

I followed the procedure given in the "tt_my_first_fpga" PDF for implementing the counter example.

We have DE0 board along with the software.

I followed as per the PDF, every thing is ok but at the end where we have to assign Pins, the pin number as mentioned in the example is not matching with S/W.

In PDF, pin numbers are mentioned as ad0 , where as in the s/w in the S/W i am not viewing AD0 but i am i able to A0.

pl. suggest the solution.

Thanks & Regards

M.Murali Krishna