Event Handler OnModelOpen do not run

Hi,

I have a LDM with an extension attached from a shared folder. Recently, I have created a new Event Handler OnModelOpen on this extension with a simple welcome message and further output window instructions in order to help users editing this model correctly. Well, whenever I open this model, the handler it’s not executed. I get no message at all. No error, nothing. Will anyone image why?

I’m running PD 16.6.5.0(5532).