With SpiraTeam 4.0, having an issue with new test set in which test cases are not listed in Add Tests

In those two projects are the Test Cases listed in the Testing -> Test Cases Module?

if yes, you should be able to add them to Test sets.  if no, each project has its own set of Test Cases and you can't share across projects.  You'd have to export/import or copy them from project to project.

 I did get an answer on this. We had to go into Administration -> Projects -> Data Tools. Then click on "Correct" next to Test Cases.  Once we did that, the test cases populated when adding to a Test Set. Thanks!