Some anti virus software can also prevent winmx working correctly, if you have Norton 2005 or 2006 a visit to the tutorials section will tell you how to set that up..
I still think a visit to the chatroom would be in order as we can ask questions & get answers in realtime, no uploads is positively either some software blocking the port (firewalls norton worm protection etc.) or an error in port forwarding, while forwarding is simple, there are a number of steps, at any of which it's possible to make a simple typo... also it's quite common for people to skip the advice at portforward.com telling them to set a static ip, & have port forwarding fail because they were assigned a new local ip.
Finally in rare cases the router ALSO has a firewall in which ports must be allowed, although this is usually covered, if you use portforward for instructions, rather than just logging in & clicking around.