absence

am having speed problem now. what shall i do. i have more than 300 seeds seeding my downloading torrent and the peers are around 50. i have a connection of 512kbps. and i dont know what to do now so can any body please help me. i have port forwarded properly and all my settings are correct. In my utorrent for some less seeded ones are speed high. last nite i got 60kb/s and now i am getting 10 to 15 kb/s. what shall i do. is that a torrent problem or what. In advance thank for any help by anyone. will be really appreciated by me.