listbox elements rearranged javascript causing eventuality validation blunder postback

i have combined an vigilant swapper control consisting twin listboxes buttons grant me barter equipment between twin lists. swapping finished controlling javascript. i also pierce equipment adult down list. fundamentally i pierce equipment list box right i store datakeys elements (guids) hiddenfield. postback i simply review guids field. all works good nonetheless postback, i following exception:

invalid postback callback argument. eventuality validation enabled controlling settlement <%@ page enableeventvalidation="true" %> page. confidence purposes, underline verifies arguments postback callback events issue server control creatively rendered them. information current expected, clientscriptmanager.registerforeventvalidation slight method register postback callback information validation.

i've prepared exam application. have download repository run project. web page name 3 items, press supplement all, following pierce third component adult turn following strike "button". blunder arrangement up. bend eventuality validation off means acceptable. anyone assistance me, i've spent twin already days but awaiting solution.