need help with sql server express 2012 dunno where to post this in

im trying to download sQl server express 2012 , so my problem is that it installs perfectly but i nowhere have the option to install localdb and the management tools during instalation, so i decided 2 download them seperate and install them , did that localdb installed but the management doesnt i keep on getting a not a valid win32 application, im using a 32 bit windows and i downloaded and installed the 32 bit version, i did a redownload still no luck ,,, any help on this?