Convert page coordinate to page item coordinate

Hello All,

I have problem regarding co-ordinate system.

I have Rects in page co-ordinate system  and want to convert with respect to pageItem co-ordinate.

This Rects are resides within a frame, my requirement is to convert pagecoordinateRect to innerRect.

I have tried using TransformParentRectToInner Or TransformPasteboardRectToInner  using IGeometry interface of page item.

Left and Right points are converted but Top and Bottom points are not updated.

Please help me to sort out above problem.

Thanks

Govind