Clip a group by a circle

Hello

I'm very new to Corel Draw, so maybe this question is straightforward. I've searching on the net but the answer I found didn't work. I use Corel Draw X6.

I created a first design (the 3 letters LEA) and duplicated it in an 2D array. All the copies are grouped.

I want to clip this group by a circle to keep only the parts that go inside the circle. I thought that Power clip would do it, but all I get is that my group disappears entirely. What did I do wrong ?

I add my file : (although I can't see it) I hope it uploaded correctly.

The file contains the group and 2 circles, I want to clip by the inner circle. Can anyone help me?