NGUI not responding fast enough

[Splankton]

Hi,
Using NGUI I have set up 2 fsms
1 st one with a NGUI button down
2nd one with a NGUI button up
 When I run it,  both work fine unless I hold down a button,   release, then immediately press down again.  And then the NGUI button down does not trigger.  It's like it's not fast enough to respond to a quick button press and my game needs fast response from holding down a button releasing then pressing down again. 
Is there a way to make it more responsive?

[Splankton]

I've fixed it by removing a scale tween that was delaying it by 0.2 secs.
Those 2 tenths are really apparent when quickly pressing/holding buttons