I have downloaded the script for Omnifocus “Complete and Await Reply” and of course i use Growl But it does'nt work.

Its says in french AppleScript a rapporté l’erreur suivante :
Il est impossible d’obtenir item 1 of {} Le script « Complete and Await Reply.scpt » n’a pas pu s’achever.

What i could translate - the script complete and await reply couldnt achieve
It is impossible to obtain the item 1 of {}.

I am on snow leopard I have dowload the script and draged it on ~/Library/Scripts/Applications/OmniFocusof course i use Growl

Would you help me many thanks indeed for i am not acustom to script