Man that's really serious.
It could be a result of a few things, such as:
1) Unstable connection.
2) Hacker attempting access.
3) Fake Servers.

But i reckon it's number 3 in this case. In which case, STOP RIGHT NOW. I want some info here. What client are you using, and what securities do you have in place to stop you from downloading off the governmental fake servers? Does your client block specific IP Ranges, or IP Addresses? Or do you use anything like PeerGuardian? Or do you use a Security file or what?