I'm trying to bind a field in a dataset to a field on a form:

private void Form1_Load(object sender, EventArgs e)
{
    Marois.UserDataAccess oUserData = new Marois.UserDataAccess();

    oUserData.bTrustedConnection = true;
    oUserData.sServer = "PC108\\SQLEXPRESS";
    oUserData.sDatabase = "Test";

    DataSet oDataSet = oUserData.GetUser(5, "UserInfo");  // Get record 5 into a DS called UserInfo

    int iRowCount = oDataSet.Tables[0].Rows.Count;

    if (iRowCount > 0)
    {
        txtFullName.DataBindings.Add("Text", oDataSet, "UserData.FullName");
    }

}

It throws "Child list for field UserData cannot be created"

Can someone help a newby?