Dynamics Nav 2009 & 2013


I installed Dynamics Nav 2009 R2 on a server where Dynamics Nav 2013 was already installed.

Now I have the following situation :

When I’m connected directly on the Server (where NAV & SQL are installed) both RTC 2013 and development environment 2013 are running fine

But when I’m connected on another server of the domain :

when clicking on the RTC 2013 shortcut : RTC 2013 is running fine

when clicking on a shortcut to connect to a special instance / database : its opening RTC 2009 !?

when clicking on the development environment 2013 shortcut development environment 2013 is running fine, but if I try to start debug its trying to open Nav 2009

Is there any way to repair this without re-installing ?