I have found many ways to edit, even reinstalling but could not be. Did not know that people who are not the same case???

One thing that I find strange is not entirely replace OD taskbar, because when it collapsed tab is still running in the taskbar, not OD

Ok,I found the Skype's commend lines for notifications (when a new message arrived) : /alertson

For more: http://www.vasyapupkin.com/skype-command-line-options/ 

Simply right-clicked the Skype icon on OD and add /alertson on the parameter line.

No guarantee it will work and currently I don't have OD installed,but that's the way to trigger some specific functions on an application (which not just open the .exe) as I have successfully done with other ones. You'r are on your own;trial and error sometimes workout.........................