image - VBA - Powerpoint 2010 ppShp.Fill.UserPicture does not update pictures -

i have powerpoint presentation vba script update images every week. recently, added 2 additional slides , scripting update images well.

the new images not update , not throw error. if step through procedure, goes correct slide, selects correct shape,

call ppshp.fill.userpicture ("blah_blah.png")

does not replace image.

if copy line 1 of slides work, does.

in example below, first 1 works, second doesn't.

'feol *******************************************************************     activewindow.view.gotoslide (15)     set ppshp = activepresentation.slides(15).shapes("feol")     ppshp.select     call ppshp.fill.userpicture("d:\mit trends\images\feol_composite.png")     'liconsem *******************************************************************     activewindow.view.gotoslide (16)     set ppshp = activepresentation.slides(16).shapes("liconsem")     ppshp.select     call ppshp.fill.userpicture("d:\mit trends\images\liconsem.png") 

again, can see go correct slide , select correct shape (named in "arrange" panel). doesn't fill. tried changing shape id, results same. know shape name , image name correct. tried cut/paste sure.

using image first section fill in second not work. using image second section fill in first does. feel must missing obvious.