Rockshox pop lock trouble

Something took a whack on the bike yesterday and the pop lock cable went all slack, I tightened it up at the shock but there it still does not 'pop' up when you hit the button on the bars. Is there a specific way to set it up?
Loosen off the grub screw fully which pinches the cable, replace the cable with a regular gear cable, re-tighten the grub screw and you should be sorted.