I am doing the advaced design tutorial and I am having a problem mirroring screw holes across a face. I've followed all the instructions but the holes don't mirror. Can I have some help with this? I've attached my file. Thanks!

Here are the instructions:

Now mirror the holes to quickly copy the existing hole features across the Front plane.

1. Click Mirror on the Features toolbar.
2. In the PropertyManager:

• Under Mirror Face/Plane , select the Front plane in the FeatureManager design tree.
• Under Features to Mirror , select the hole feature in the FeatureManager design tree or in the graphics area.

3. Click OK .

The holes are mirrored across the large face of the hinge.

4. Save the part.