Using arrow keys to move from card to card

[Marian Petrides, MD]

I have a stack which functions just as I intend it except for one  
card.  When run from a splash screen standalone, that arrow keys on my  
Mac can be used to go forward and backwards in the stack--UNTIL I get  
to cd 10.  On Cd 10 the arrow keys do not navigate to the next or  
previous cd, they just seem to do nothing.  If I get to CD 11 by using  
scripted buttons, then keyboard arrow keys work fine, as they do on  
every other card.

For the life of me, I can't find the spot where keyboard navigation  
got toggled off on CD 10.  Can anyone help me?

TIA

Marian