Port blocked

Hi

OS = Win XP SP 3 Updated
BitComet = V1.34

I am a newbe to torrent downloads. No downloads done succesfully yet. I have tried different clients as well.

BitComet is not connecting to the torrent servers I keep getting a port blocked error no matter what port I use or what torrent server I use. In the bottom right corner it keeps telling me that the port is blocked.

any help would be appreciated

Robert