Route file doesn't route to the right controller, once updated

Route file doesn't route to the right controller, once updated

I have this problem :
I have my route file, containing a valid route to a controller. I compile,
I have no error. I send a request, it calls the right method on the right
controller, everything is working.
Then I changed the name of that controller and changed it in the route
file. I compile, I have no error. But when I send a request (I see it via
my proxy), the request is never transmitted to the controller.
If I change the name of the controller back to the first one, it works !!
I have reboot and clean-all, but nothing works, do you have an idea ?