Save the template as your own file name and define the editable regions to be your own names. Is it a standard template in the program or one you have downloaded?
I do not use V8 so am not familiar with its system of interface however it is more than likely an issue with the template. Also be sure to check the file you have downloaded if that is the case is not set to read only that might be the reason you cannot change it. However as I say I am guessing here.