Entity Framework Code First Azure connection

I am using Entity Framework Code First 4.3 + Azure and having difficulties connecting to the database. The error I get is the following (on the first query):

Keyword not supported: 'server'.

I have the following connection set up in my Web.config

<configSections>
    type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.3.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
  </configSections>

  <connectionStrings>
    <add name="TestDBContext"
         connectionString="Server=tcp:[SUBSCR].database.windows.net,1433;Database=[MyDB];User ID=[user];Password=[pass];Trusted_Connection=False;Encrypt=True;PersistSecurityInfo=True"
         providerName="System.Data.EntityClient" />
  </connectionStrings>

My DbContext implementing class uses the connection string's name:

public class MyContext : DbContext, IMyContext
    {
        public MyContext()
            : base("TestDBContext")
        {
            Configuration.LazyLoadingEnabled = true;
            Configuration.ProxyCreationEnabled = true;
        }

Can you tell what is going on?