[Haskell] Cabal update failed

Hello all, please help me with cabal updating. When i run: cabal update -v3 I get this message: Downloading the latest package list from hackage.haskell.org Sending: GET /packages/archive/00-index.tar.gz HTTP/1.1 Host: hackage.haskell.org User-Agent: cabal-install/0.10.2 Creating new connection to hackage.haskell.org cabal: failed Thanks in advance, Nadav