[Closed] Script flow problem

I am relatively new to Maxscript and I am having a problem running the attached script. The first time it is run, it does not work. If it is run again however it works fine. There are obvious work around for this problem but I would really like to know if anyone knows why this script does not work first time and a good solution to make it work? I have a feeling I am missing something quite fundamental…

 fn createMasks = 
( 
if matMasker.DSMaskCheck.state == true then 
( 
	print "Check box is true" 
) 
else 
( 
	print "Check box is false" 
) 
)
 
rollout matMasker "Masking" 
(
checkbox DSMaskCheck "Mask" checked:false 
button DSCreate "Check Status" 
 
on DSCreate pressed do 
( 
	createMasks() 
) 
)
 
DSFloater = newRolloutFloater "Material Masker" 200 100 
addRollout matMasker DSFloater 
 

Thanks,

Rob