Help needed for 2 Errors

[clmlbx]

Hello.

am using utorrent from a long time but have not got this error before.. I get two errors .not on every torrent but only on few torrents occasionally .. nothing similar in those torrents error are

1. Error: Error-1

2. download in unknown state

some thing like that .. pls help, it starts downloading but after few minutes it gives this type of errors ......then if I again start it ..it starts then after few minute same error... pls help