Prior to writing this, I had already cleared Kilkreath Ruins for Meridia. I just spoke with Arngeir and he lead me here to find a Word of Power. I can't get past the room in Kilkreath Catacombs with the two doors to the east and the raised platform with the glowy ball on top of it. The door requires a key. After doing some research, I found that the "key" is the glowy ball. I have already manipulated that glowy ball when I first cleared Kilkreath. I tried using "E" on it again but it won't work. How do I manipulate it again to open those doors?

The word wall is outside the ruins.

Oh! Thanks!