Combobox help

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C#

I feel really dumb asking this question but...

I am using a combobox after the selection is changed the first time, I try to change the selection and my method does not get invoked. I'm unsure of what I'm doing wrong.

names.SelectedIndexChanged += delegate
            {
                if (btn.Name.StartsWith("1"))
                    ptsValue = 100;
                else if (btn.Name.StartsWith("2"))
                    ptsValue = 200;
                else if (btn.Name.StartsWith("3"))
                    ptsValue = 300;
                else if (btn.Name.StartsWith("4"))
                    ptsValue = 400;
                else if (btn.Name.StartsWith("5"))
                    ptsValue = 500;
                else
                    ptsValue = 600;

                int score = 0;

                for (int i = 0; i < NamesFLC; i++)
                {

                    if (String.Compare(tableofNames[i], (string)names.SelectedItem, StringComparison.OrdinalIgnoreCase) == 0)
                    {
                        score = tableofPoints[i];
                        score += ptsValue;
                        tableofPoints[i] = score;
                    }
                }
                QuestionBox.Controls.Remove(names);
                QuestionBox.Controls.Remove(cls);
                QuestionBox.Controls.Remove(question);
                this.Controls.Remove(btn);
                QuestionBox.Close();
            };

What I'm after is being able to change the selection and this being invoked EVERY time. Is there a way to reset the control such that after it's changed the first time it will acknowledge the next change? Thank you for all your help