i have been seeding for 8 hours, but there's no changes in my ratio
Just because you are seeding doesn't mean you are uploading. There has to be someone at the other wanting to share from you
Also, you need to be sure that the port number that your torrent client uses (both TCP and UDP) are forwarded from your router (often built into your modem) through to your computer. In most cases, either setting a static IP address for your computer or setting a static DHCP reservation for your computer are recommended to ensure that your IP address within your local network does not change, thus rendering your port forwarding ineffective.