POSTAL 1 glitch - Unable to load next level despite meeting goal

[KD6-3.7]

I'm playing POSTAL 1 (first level), and I've killed everyone in the level, but when I press F6 to move to the next level, it tells me I still need to kill 90% of all the hostiles, even though I killed all of them and the innocents. What's going on?

Do I need to carefully spare non-hostiles? I think it's a glitch, and I'm stuck.

Also, I know for a lot of people F1 is the button to move to the next level. For me it's F6 because F1 changes brightness. Any help would be highly appreciated. Thanks!

[swaff]

Try holding FN whilst holding F1.

[KD6-3.7]

Looks like that did the trick, thanks a lot!