i am having problems trying to download any of the 4 free EA games on my xperia play

i download the initial small apk file,then i download the larger file between 100 and 400mb depending on the game,once this doenload reaches 100% the download doesnt do or trigger anything it just sits there at 100% if i try and do anything after that i have to download the whole file again...tried everything i know and i cant get them to work....just EA games gameloft and market games are fine.......any ideas

One question, are you downloading the additional files using WIFI or 3G connection?