Help with drop down list

I have this code for my drop down list on my webpage but its not returning any information. Can someone please help me out?

Code:

---

Sub getRimTypeTW()

        Dim ss As New SQL
        Dim da As DataAccess
        Dim dt As New DataTable

        dt = da.returnDataTable(ss.ddlRimTypeData)
        Me.ddlRimType.DataSource = dt
        Me.ddlRimType.DataTextField = "RIM_TYPE"
        Me.ddlRimType.DataValueField = "IDENTIFIER"
        Me.ddlRimType.DataBind()

    End Sub

---

Dim ss As New SQL is your dropdownlist??!
You can ask on the vb.net forum because i don't see any asp.net usage but you won't get any answers without explaining what is what and also what errors do you get if any.