I have created a small schedule in Project 2007 that has 71 lines. I created it without assigning resources but I have used predecessors to define the critical path. Virtually every task shows critical even though several have weeks of float available. I have tried to simplify the predecessor links by making them all "Finish to Start" and the constraint types to "As soon as possible" but to no avail. Every task shows critical bar style in the Gantt chart. What am I doing wrong?