Linear Pattern on Arc

Hi,

I am using MicroStation CE. I am trying to place linear pattern along an arc (the blue line), but the pattern goes on straight line instead (the pink pattern). The arc is one signal element and not in a complex chain.

I

The cell I am using for linear pattern is a rectangular shaped box with hatch inside. It's made in full size 1:1.

Am I missing any setting to get linear pattern to place along an arc?

Thank you,