before 2009, there are very few small kids being accepted
2009 and after, more small kids being admitted
don't apply 1 year after, Sept kids are not too small. The school will accept applications for 2011/2012 for children born from 1/1/2008 to 31/12/2008.
But my girl just accepted by MS
her bd is oct 06 (coming K1)
If I were you, I will try again like me next year if you really want to enter this school.