AutoCAD Inventor :: Design View With Occurrence

I am working on some codes that let me make some change on visibility of occurrence. So I am I main assembly, and 3 occurrences of the same sub-assembly. The sub assembly was saved on a design view named hole that is hiding some occurrences.

if I work with one of those sub assembly (checkOcc as component occurrence)and then I try this:

                Debug.Print("Occurence name: " + CheckOcc.Name)
                Debug.Print("Is DRV associative: " + CheckOcc.IsAssociativeToDesignViewRepresentation.ToString)
                Debug.Print("The Active DRV is: " + CheckOcc.ActiveDesignViewRepresentation.ToString)
                CheckOcc.SetDesignViewRepresentation("Default")
                Debug.Print("Is DRV associative: " + CheckOcc.IsAssociativeToDesignViewRepresentation.ToString)
                Debug.Print("The Active DRV is: " + CheckOcc.ActiveDesignViewRepresentation.ToString)

The first time I check for the name, the result is empty, but is should hole as it's what I can see in the browser. then I change it to default.The result of that, the representation views disappear from the browser for that occurrence and still, the name is return as empty...then I carry on with turning on the hidden occurrences.

objCol.Add(checkocc)
dv.SetVisibilityOfOccurrences(objCol, visibility)

The result, all the hidden occurrence appear ALSO on the other subassemblies... It look that it's affecting all the Designview of all occurrence of that name...then, if I try the reverse, by turning it off... the switch off on the other occurrences but not the one that is checkoff!!