DropDownList Inside CreateUserWizard

I am using the createuserwizard, and have set up my own profile table which hold first name, last etc. In my CreateUserWizard, the field for Vendor is a dropdownlist that is to be populated from a list in a database. I set up the form without the createuserwizard, and everything went skippy, but when I placed it into the wizard, I now cannot access the control of the dropdownlist.

I have tried doing..


Using SqlConnection As New SqlConnection(WebConfigurationManager.ConnectionStrings("Personal").ConnectionString)
Dim VendorID As DropDownList
VendorID = CType(CreateUserWizard1.FindControl("VendorName"), DropDownList)


Dim MyReader As SqlDataReader
Dim sel As String = String.Format("SELECT VendorID, Name FROM Vendors")
Dim MyCommand As SqlCommand
MyCommand = New SqlCommand
MyCommand.CommandText = sel
MyCommand.CommandType = CommandType.Text
MyCommand.Connection = SqlConnection
MyCommand.Connection.Open()
MyReader = MyCommand.ExecuteReader(CommandBehavior.CloseConnection)
But when I go to databind, it says:
Object reference not set to an instance of an object.
VendorID.DataSource = MyReader
Line 30:             VendorID.DataValueField = "VendorID"
Line 31:             VendorID.DataTextField = "Name"