cause: running Activex control is not enabled. Solution: Enable running Activex controls to solve this problem.

1. click security in the "open Internet" option.

2. then click the trusted site and click the site again.

3. add the trusted website to the zone box, and then click the add button.

4. add the beginning of the HTTP site to the check box at the bottom to delete it, and then click close.

5. after clicking the custom level button, add a trusted website.

6. all ActiveXdu projects can be checked and enabled.