Sweep-Problem

 From:  B-W-Design
3431.1 
Maby there is something i don't understand, but it should be so simple i think.
I want to create a room with some stucco-profile round the ceiling.
But when i do a sweep it dosen't match to the wall or the ceiling.

The manual dosen't helped me.

What am i doing wrong?
How can i adjust the position of the profile?

See attached file.
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