The following code is supposed to display a grid on a page depending on user selection. It does initialize, but why does it not show?

IF !(Type('this.pageframe1.page2.'+grdClass)='O') && add new grid
this.pageframe1.page2.addobject(grdClass,grdClass) &&same name
ENDIF
temp=this.currentbrowse
IF TYPE('temp')='C'
this.pageframe1.page2.&temp..visible=.F.
ENDIF
this.currentbrowse=grdClass
WITH this.pageframe1.page2.&grdClass
.top =this.pageframe1.top+10
.left =this.pageframe1.left+50
.height=this.pageframe1.height-10
.width =this.pageframe1.width-60
.visible=.T.
ENDWITH