The uTorrent application strongly depends on your Internet connection and from the settings that can be configured in the Settings menu.
First go to Options > Preferences > BitTorrent and make sure the Protocol is Enabled or Forced. In the Connection section, choose a port higher that 50000 (to avoid compatibility with other applications) and the last part requires you to increase the connections number in the Bandwidth category.
Restart uTorrent and everything should be ready. The uTorrent will download at maximum speed based on the number of Peers (seeders & peers).