in phoenix 2008...when i scan my N72 product ...then my product code appear as 0531541 but when at last step in firmware update in selection of product code ... i can't find it when i press refurbish button by selecting AUTO DETECT i get error of " IMAGE or PPM file has to be specified"

so can u give me solution or give me latest offline firmware containing 0531541 product code.....or give me some idea....thanks in advance.