Queries :: SELECT Records From A Table Based On IN Clause And Sort Them In Order

WinXPPro Sp3
Access 2007

After some research I thought I had found a neat way to SELECT records from a table based on an 'IN' clause and sort them in the same order as the values for the 'IN' clause... i.e.

Code:
SELECT Unique_No, Table_Name, List_Order FROM My_Table
WHERE Table_Name = 'Titles'
AND List_Order IN (3,1,15,4,5,12,7,2)
ORDER BY INSTR('3,1,15,4,5,12,7,2', List_Order)

Unfortunately, this returns list_order 5 just after 15 and list_order 2 just after 12, thus

List_Order
3
1
15
5
4
12
2
7