Hi, Stephen
If the tasks are black rather than green in your task list this means that they are currently inactive. There are at least seven different things that can make a task inactive. I could go through a whole tutorial here on criteria for designating a task "active" but that would probably just confuse you. So instead, why don't you just ask your tasks to tell you why they are not active?
1. Pick a task that is black but that you think should definitely be active
2. Click on the task so that it gets a light blue background, meaning that it is the currently selected task
3. Find the Task Properties sidebar on the right side of the screen. The title bar at the top should show the name of your selected task
4. within the sidebar, find the section headings, which have a gray background. Scroll down until you find a section header saying "Task Statistics"
5. In the task statistics section look for "Action". This will tell you whether the task is active or not and if it is inactive it will tell you why.
Assuming that your tasks actually are inactive, when you see the reason you may know right away what to do. If not, check several other tasks and see what reasons are given for their inactive status. If you don't understand the reason or you don't know how to fix it, write back. Be sure to copy the reason for inactive status carefully, no typos!
-Dwight