Weapon focus with weapon pre req

[bodrin]

Hi all,
I'm entering the Complete warrior feat Power critical (page 103).
You get a +4 bonus on the dice roll to confirm a threat of a critical.

One pre requisite is Weapon Focus with weapon.
I've set the Pre req script to check for weapon focus, I've set restrict to picks on hero but when I test it on a fighter with two flavours of weapon focus "Short sword and Longsword" for example Power critical doesn't show the weapon drop down list to assign which weapon the feat is applied to.

How can I get the drop down list to display the weapon focus weapons selected by the Hero?

Any help please