OK, well that makes two problems with your code. First, when using the column property, the column count begins with zero. So if you want to reference the second column you have to use a 1 not a 2.
Second, if you are concatenating a text value into your SQL statement you need to surround it with single quotes. Try:
sTestSQL = "SELECT * FROM PerftoGoal2013_tbl WHERE [MSA Code] = '" & Me.Combo11.Column(1) & "';"
You also didn't answer where the controls are. The code you have, refers to Combo11 being on the active form and you are changing the Recordsource of the active form. But then you are requery a subform.
If your goal is to change the Recordsource of the subform, then your code should be:
Me.PerftoGoal2013_subform.Form.Recordsource = sTestSQL
I'm assuming that combo11 is still on the main form.