4
Go to admin/system/preferences/general settings
Scroll down and find where it says Update Template/Html files, or something like that and set it to YES. Then scroll down and click on Go.
Now go back to the pages and try again. You might need to refresh the page for the blocks to take the changes.
After you make changes and before your site goes live make sure you reset the Update Template/Html back to NO.
Also, if the above doesn't seem to work for you leave it set to YES but then go to admin/system/modules and update the system module. Or ftp to your site and delete everything in the Template_c folder-EXCEPT the index.html.
Hope this helps,
Quest