projectserverdragon --
Open the project in question, then click View - More Views. In the More
Views dialog, click the Edit button for the View that is currently selected
(and displayed in the project when you open it). By chance, is the Using
Resources... filter selected in this View? If so, change it back to the All
Tasks filter, then click the OK button and Apply button. Save the project
when finished. Let us know if this solves your problem.