bittorrent not working

here's the problem:

i'm using bittornado 0.3.8 which has been functioning perfectly until the day before yesterday. since then i could not get to any tracker announced by greedland.net--i keep getting "problem connection to the tracker: http error -1". any tracker announced by any other site is OK. i can also access greedland webpage w/o problem. connecting thru VPN doesn't solve the problem either.

any idea what's wrong?