cannot update firmware for m240 vista

i plug it in and nothing happens, only if in mtp mode does the updater come up, but then it says error needs to be in msc mode.

there is a firmware upgrade link here: http://www.sandisk.com/Retail/Default.aspx?CatID=1326

but it only has 2.1.0A, where the latest one is supposedly 2.2.5A?