wireless and torrent problems

hi all
i have a d-link wireless adsl router which i have set up with port forwarding with bt tornado and works fine through the ethernet conection in my main computer.but through the wireless adaptor on my other computer i always get a yellow conection and very slow downloads.does the wireless adaptor need something doing to it or can it just not handle the connection.
many thanks in advance.

you might need to open the ports on your firewall or it might be the adaptor

Have you checked here to ensure settings were correct?
http://portforward.com/english/routers/port_forwarding/routerindex.htm

You cannot setup the same port for both machines though

Well you already know the solution with your main pc, so setup some ports for other pc and you're all set.