compile won't work

I made an app. It has a GUI with some buttons. The buttons run Applescripts to open folders. It works on MY early 2011 17" MBP but NOT on my co-workers. We all have different OS versions. The app WILL NOT even open on their machines. I’m a little rusty with XOJO but I think it may be because I set the build settings to 64 bit. I set it to 32 bit and re-compiled. I’ll have to wait till Monday to see if that was the problem.

Any thoughts?

Which OS version do they have ?

Are you doing anything special in ? Like declares ?

Are their OS versions earlier than 10.7?

Do you codesign your software?
If not, their default preferences may prevent your app from executing as it isn’t codesigned and not from the app store.