No window interaction

Hi,

I am currently porting an application on MacosX.
I am new to macos development so it's quite a pain for me.
Somewhere in the code, a carbon window is created with the function CreateNewWindow().
All the events stuffs to handle mouse and keyboard interaction are set up.
Mouse enter and exit events are catched correctly by the application  BUT all the interactions which are supposed to be handled by the system like select the window, move it, resize it are not...
It's weird because it seems like events are not received and/or processed by the system window manager that therefore don't do his job.
I have no idea what's happening, maybe something wrong with the window initialization...
If someone already had this kind of problem it would be nice to get some advices

Thank you in advance

Emmanuel Quetelard.