Unrecognized client.  Please use a valid BitTorrent client.

I'm getting this error when trying to download from a popular torrent site:

Unrecognized client.  Please use a valid BitTorrent client.

I tried passing in an ID of a known torrent client like this:

``` javascript
var client = new Client({ logLevel: 'DEBUG', id: '-UT1610-'});
```

But haven't had much luck. Has anyone else seen this?
