Pass session variable form ASPX page to ASHX Handler in Chrome

I have a ASPX page that I am doing a image upload on

In the vb code I am setting a session variable for the file path
        PathTemp = Server.MapPath("EmailImages/") + Session("BusinessID")
        Session.Add("templateImagePath", PathTemp)
(AND)
Session("templateImagePath") = PathTemp

The file is passed to an ASHX handler page
I am trying to get the session variable on that page

I have tried several ways including this...
Dim filePath as String = ""
filePath = HttpContext.Current.Session("templateImagePath").ToString()
and this
filePath = context.Session("templateImagePath").ToString()

ALl of which gives me an object doesn't exist on that line of code.