as far as i know UTorrent only runns on intel based NASes (x39, x59, x69, x79, 509 and 809).
a 412 however has a ARM CPU so you are out of luck.
but there are other alternatives like the rTorrent++ or the transmission QPKGs
TS-639 Pro | Version 3.6.1 Build 0302| 5x 2TB SAMSUNG HD204UI RAID5 + 1x 320GB WDC WD3200AAKS
LianLi EX-50 with 3x 2TB SAMSUNG HD203WI +2x 2TB SAMSUNG HD204UI in RAID5 as Backup drive
TS-109 + TS-109 Pro II | Version 3.3.2 Build 0918
HDI Dune BD Prime 3.0, SqueezeBox Duet, Netgear GS608 v2 8 Port GBit Switch