How to ensure an app is always in the active virtual desktop

[Obelix27]

I am using a VOIP app (MicroSip) that only seems to ring on an incoming call if it is active in the current virtual desktop. Is there a way to ensure the app moves so that it is always be in the active virtual desktop? I tried copying it to all desktops but that didn't seem to work in that not all copies rang on an incoming call.