Please remember that in order open the ports successfully, so other people can connect to you, opening ports in your router is not the only thing neccessery. You might opened your ports successfully on your router, but you need to check some more things. First of all, Check in your router's firewall if it is enabled. If it is, disable it. Then in your computer, if you have Win 7 make sure you disable Windows Defender. To do that hold Windows button and press R. Then type services.msc. Find Windows Defender, and disable it. Also you should disable window's firewall too, and if you have any anti-viruses, turn it off if it stills says offline. Good luck.