New deployment doesn't update current one, although priority is increased

Hi,

I have a new version of an applicaiton, so I copied the deployment type, changed the name and updated the source.
The client  sees it but doesn't install it.
Appdiscovery says:

+++ App-V 5.X package Ourpackage (3.0) not installed.
+++ Did not detect app deployment type Ourpackage (3.0) revision 4) for system

But appenforce does not install it.
When I go via sccm clientcenter, I can see it as "not installed", if I click "install" the installation continues.

Please advise (should I redeploy the Application? Can't do that, it says it's already deployed.)

J.

Jan Hoedt