TLB Clock: getting AM & PM

All:
Using the default skin in TLBClock, how do I get "AM/PM" to show?

Currently I have "hh:mm" But that only gets me something like "12:24".

I tried the MS Excel sytle of "hh:mm AM/PM" but that only got me "12:24 AM/PM". And, "hh:mm am/pm" humourosly enough gets me "12:24 a24/p24".

Thanks

The format code for AM/PM is "t" or "tt".

thanks