Upload file to network drive in ASP.Net

Let me start with my current setup

Frontend - IIS7 Server

Backend - SQL 2005 Server

I have an .net web form that upload an excel file to my server. I would like for this Excel file to be upload to my SQL server since it need to be process by a sql command and the SQL server cannot seems to be able to access the IIS7 when running the quary i needed. All i want to be able to do is to load this excel file to a folder within the SQL server.

Here is my web.config folder path -

  <appSettings>
    <add key="FolderPath" value="Uploads/"/>
  </appSettings>

and here is the code -

    Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        If FileUpload1.HasFile Then
            Dim FileName As String = Path.GetFileName(FileUpload1.PostedFile.FileName)
            Dim Extension As String = Path.GetExtension(FileUpload1.PostedFile.FileName)
            Dim FolderPath As String = ConfigurationManager.AppSettings("FolderPath")

            Dim FilePath As String = Server.MapPath(FolderPath + FileName)
            FileUpload1.SaveAs(FilePath)
            GetExcelSheets(FilePath, Extension, "Yes")
        End If
    End Sub

when i try to change the path in the web.config it will tell me it cannot use physical path only virtual.

I will appreacite any idea.

Thank you.