Can't get image from network server

I inherited a web site that has a web page that displays images of properties for an online property/tax info. Using VB code, it searches for a main image then creates and saves smaller images for use as thumbnails. Currently it gets the images from a directory on the web server. The images are copied to the web server via a job from another server on our network. I am trying to code the page to get the images directly from the original server and having trouble doing it.  Here's the code. Point of failure is indicated:
Sub Thumbnail2(ByVal file As String) 'This line will be changed once I get the lines below to work. Dim checkfile As IO.FileInfo = New IO.FileInfo(Server.MapPath("parcelimagessmall/" & file)) If checkfile.Exists = True Then Else 'Dim sImagePath As String = Server.MapPath("parcelimages/" & file) 'My plan i ...