please note that ICAI never allows to re-valuation of answer sheets. ICAI notifies that retotalling of answer sheets and the fee for retotalling of answer sheets got revised as Rs.100/- per paper and a maximum of Rs.400/- effective from may 2008 declaration of results.
Write an application by hand giving detail w.r.t. your roll no. attempt ed group, papers desired to be revalued and attach the required fees by way of postal order favour of Secretary, ICAI. Result will be out in max of 30 days. chances are low but u cant say.