render. and AMKE SURE you comb over all of the options in the render box, inputs/outputs/etc
are you doing multiple files? if so, you have to do the batch file and the whole selection and to make a new file, if doing any resampling/dithering, you have to make sure the wav properties are set to change, like set the properties dialog box to 16-Bit when dithering from 24-bit, etc
any questions, shoot me a PM