StoredProcedure And DataSet Return

I am trying to write a function for some source to make a call out to and fill a RadioButtonList.  I am running into a few problems though that I need assistance on.  (I am new to DataSets)

Here is the function to fill the RBL:

 1 Private Function GetDataSet(ByVal QuestionID As Integer, ByVal QuestionType As Integer, ByVal LocaleID As Integer, ByVal GroupingNum As Integer) As DataSet
2 Dim cnn As New SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)
3 Dim cmd As New SqlCommand
4 cmd.CommandText = "usp_responses_sel"
5 cmd.CommandType = Data.CommandType.StoredProcedure
6
7 ' Fill usp_ with Parameters
8 cmd.Parameters.AddWithValue("QuestionID", QuestionID)
9 cmd.Parameters.AddWithValue("LocaleID", LocaleID)
10 cmd.Parameters.AddWithValue("GroupingNum", GroupingNum)
11
12 Dim da As New SqlDataAdapter
13 da.SelectCommand = cmd
14 Dim ds As New DataSet
15 da.Fill(ds, "response")
16 Return ds
17 End Function



So my issue is with line 15 [da.Fill(ds, "response")].  I pulled this function from somewhere else and am trying to tailor it to my needs.  However, I do not understand what I need to do with this line and it keeps bombing out.  I thought this references the DB Table but in my case, the SP has several tables joined together.  Is this how I reference it from the calling source code?  Please assist.

Also, I am having problems understanding the binding process from the calling source.  Here is my code that calls the function:1 Dim ds As DataSet = GetDataSet(CType(e.Item.DataItem("question_id").ToString, Integer), QuestionTypeID.Value, intLocale, 2)
2 rblResponses2.DataSource = ds
3 rblResponses2.DataBind()
 

What do I need to do with it from here and how can I work with it after it's bound?

Thanks