ExtJS FormPanel Only Rendered to Panel the First time it is Selected -

my form panels need rendered based on selection in xml tree structure. however, form panel specific node rendered first time. when change selection else , return original selection, form panel not re-rendered.

it rendering correctly based on selection before when had simple ext.template , did

var temp = ext.getcmp('details-panel').body;

and then

(ext.template's name).overwrite(temp, node.attributes).

when changed overwrite line to

(form panel's name).render(temp), works first time.

any idea missing? thanks!

a component render once in extjs, after need make use of dolayout() after adding , removing child components.

formpanel.dolayout();