Picture doesn't show on 1st page of report

[upsman]

I would like to print a picture on a report behind the report data. The
picture prints fine on all pages of the report except the first page; I can't
get it to show up on the first page. I have the following code in the
On Format event of the detail line;

If Me.Office = "home" Then
Me.Picture = "I:\My Documents\My Pictures\home.bmp"
Else
Me.Picture = "I:\My Documents\My Pictures\branch.bmp"
End If

Any ideas why the picture won't print on the first page but does on all the
others?

Thanks.