Hi Trilogyfm,
My apologies for the late reply. This one slipped past me.
Once a field is created, the name cannot be changed. You will need to delete this field and re-add it to the table if you would like to modify the field name. You can however, change the name of the field as it appears on a screen. Once you have added the field to your screen, select Edit. Changing the Caption will change the display name of the field on your screen, but will not change the field name in the table.
I hope this helps.
-Audisho