Try putting this in your ASP code:

  Response.Expires = 0
  Response.Expiresabsolute = Now()-1
  Response.AddHeader "pragma","no-cache"
  Response.AddHeader "cache-control","private"
  Response.CacheControl = "no-cache"

And put this into your section:

<META HTTP-EQUIV="Expires" CONTENT="0">
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="cache-control" CONTENT="no-cache, no-store, must-revalidate">

That should pretty much cover things and redundantly so.