Glass Mapper - "The given key was not present in dictionary" - sitecore

Question

We're trying to configure Glass Mapper for our Sitecore 6.6 instance but came across this error when testing it out.
[KeyNotFoundException: The given key was not present in the
dictionary.]
System.Collections.Generic.Dictionary`2.get_Item(TKey key) [phone]
Glass.Mapper.AbstractService..ctor(String contextName) +99
Glass.Mapper.Sc.SitecoreService..ctor(Database database, String contextName) +55
Glass.Mapper.Sc.SitecoreContext..ctor() +98
[Sublayout].Page_Load(Object sender, EventArgs e) in [Sublayout].ascx.cs:18
System.Web.UI.Control.OnLoad(EventArgs e) +109
System.Web.UI.Control.LoadRecursive() +68
System.Web.UI.Control.LoadRecursive() +165
System.Web.UI.Control.LoadRecursive() +165
System.Web.UI.Control.LoadRecursive() +165
System.Web.UI.Control.LoadRecursive() +165
System.Web.UI.Control.LoadRecursive() +165
System.Web.UI.Control.LoadRecursive() +165
System.Web.UI.Control.LoadRecursive() +165
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
+4498
and the code calling this is
protected void Page_Load(object sender, EventArgs e)
{
var context = new SitecoreContext();
Model = context.GetCurrentItem<Article>();
}
Version 3.3.1.53 is installed (as we had issues with our version of Sitecore on 4.x versions)

Answer 1

This might happen when context hasn't been loaded properly.
Make sure you deployed all the config's that comes with Glass eg:
Website\App_Config\Include\Glass.Mapper.Sc.CastleWindsor.config
Also make sure you copied across all the .dll's that comes with Glass Installation.