I updated the tags on this post to make it more visible.
I suspect that you have your calibration table options set up to calculate concentration as opposed to response factor. To check this go to the Calibration dropdown menu and then Calibration Table Options -> Edit Options. In the Calibration Table Options window there should be a section titled 'Select the value to be calculated', under which you can select radio buttons for either Amount, Area or Height, or Response Factor (Amt/Resp).
If you have Amount selected for this setting, then the software will prevent you from manually entering an amount value into your calibration table. Normally you would want to have ChemStation calculate the Response Factor by supplying it with an area (from integration results) and an amount for a known calibration standard.
Hopefully this helps.
Thanks a lot. I think maybe I was thinking downstream that it was an amount I wanted calculated. I was figuring I had selected one box that was giving me my problems.