Hello Steve,
In order to reopen a closed task, go to the project's Completed Tasks page, and check the box next to the task you need to reopen. At the top of the task list, you will see a drop-down called "change the task status to..." Choose your status and your task will go back to the incomplete task list.
Karine Simard
Customer and Marketing Relations
Websystems, inc
www.aceproject.com