Logic Pro 8 MBP number lock for keyboard shortcuts

Hi All,
I'm a bit stumped with my new MBP. The 'fn' key doesn't toggle the 'F6' number lock as it did on my older powerbooks. I need to do this to access my keycommands in Logic and PT.

Hi All,
The older MacBooks / powerbooks had a secondary '+' and '-' key on the backslash and semi-colon that could be accessed using the function key. The new MBP's don't have that option. Oh well... I changed my keycommands.