1) To be able to make modifications to the template using Dreamweaver, you must extract the power stoer files to the root of your dreamweaver site.
double check that the power store files are at the root of your dreamweaver site.
2) When you modify the template, make sure that none of the other files are open in Dreamweaver.
3) When you save your changes, you should be prompted to update files that are based on the template. If you are not prompted to update files, you can force this by going to Modify -> Templates -> Update Pages.
4) After updating all of the pages, you must upload the entire site to your remote host.