ASP.NET runs locally in Vis Web Dev but not on server - Type not defined

I know this will seem like a dumb question but I'm just getting started in .N开发者_如何学编程ET from an old-school C mindset.

I created a program in MS Visual Web Developer 2010. It has a form that simply launches a script that manipulates a database. The project lives in several files and they are all inherited so they see each other and it accesses a MSSQL Express DB on one of our servers.

When I F5-Run the project locally on my PC it works fabulously. When I copy it to a web-enabled (application) folder on the server it executes but almost my very first line of code fails with this error:

Type 'Able' is not defined.

which is in some code like:

Namespace TTASync
Public Class Sync
    Inherits System.Web.UI.Page

    Public Sub btnBegin_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnBegin.Click
        txtStatus.Text = "Running"
        txtOutput.Text = "BOO"
        Begin()
    End Sub

    'create the classes
    Public myAble As Able = New Able

Where btnBegin is the launch button in my web page.

As I said, it works great on the PC running locally in the ASP.NET Dev Server window but not on the server. What am I missing?

Any help is appreciated.

---

It turns out it was a dumb question. I had started a web Project instead of a web Site and was just totally confused about the implications of each. It's all sorted now but if anyone is reading this in the same situation find out which is which and see if you are doing the right one to start with.