Code folding isn't working in Management Studio?

Code folding isn't working in Management Studio?

I have SQL Management Studio 10.50.1600.1, and I have Outline statements
turned on in Tools -> Options -> Text Editor -> Transact-SQL ->
IntelliSense, but alas it's not giving me the expander on the BEGIN
statements.
I've also verified that IntelliSense is enabled for the query window I'm
in, and SQL CMD Mode is disabled.
Further, I've verified that I'm not connected to a down leveled server,
I'm connected to a server that is version 10.50.2500.0.
Finally, I've verified the version of the database itself, it's a v100
database.
NOTE: the actual IntelliSense isn't working either, and this is a SQL
Express instance, I don't know if that makes any difference at all but I
thought I might mention it.