mvvm - Injecting Instantiated ViewModel to View with AvalonDock -

i have observable collection of viewmodels bound avalondock's layoutitemtempate. when user opens problem fetched list, creates new viewmodel in observable collection. new document created result, new , not use viewmodel collection.

i tried use converter, doesn't seem use converter @ all. know alternative? perhaps code-behind solution?

here main xaml snippet . . .

 <window.resources>     <pconv:iprobleminfotofreeresponsevmconverter x:key="freeresponsetovm" /> </window.resources> . . . { lines down } . .  . <dock:dockingmanager.layoutitemtemplateselector>     <selector:layoutitem>         <selector:layoutitem.problemeditviewtemplate>             <datatemplate>                 <problem:freeresponseedit                      datacontext="{binding selectedproblem,                         converter={staticresource freeresponsetovm}}" />             </datatemplate>         </selector:layoutitem.problemeditviewtemplate>     </selector:layoutitem> </dock:dockingmanager.layoutitemtemplateselector> 

my converter code . . .

[valueconversion(typeof(freeresponse), typeof(freeresponseeditviewmodel))] public class iprobleminfotofreeresponsevmconverter : ivalueconverter {     public object convert(object value, type targettype, object parameter, system.globalization.cultureinfo culture)     {         if (value freeresponse)             return new freeresponseeditviewmodel(value freeresponse);         return value;     }      public object convertback(object value, type targettype, object parameter, system.globalization.cultureinfo culture)     {         if (value freeresponseeditviewmodel)             return (value freeresponseeditviewmodel).problemitem;         return value;     } } 

binding itemsource stack of freeresponseeditviewmodel, datatemplate creates freeresponseedit , injects freeresponseeditviewmodel view datacontext automatically.

<dock:dockingmanager.layoutitemtemplateselector>     <selector:layoutitem>         <selector:layoutitem.problemeditviewtemplate>             <datatemplate>                 <problem:freeresponseedit />              </datatemplate>         </selector:layoutitem.problemeditviewtemplate>     </selector:layoutitem> </dock:dockingmanager.layoutitemtemplateselector> 

the datacontext omitted altogether.