The error message reported by the OP has nothing to do with your supposition that the image is a wrapped shape; indeed, the desire to apply top/bottom wrapping implies it is not.
That simply isn't true; the borders & shadowing - which your code doesn't even attempt - can be applied beforehand. Moreover, your own code for the wrap format conversion follows your attempt to process the selection as a shape (it must precede that!!).

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]