I am in the same boat as you. i have tried tons of different port numbers and nothing. here are answers about my system
1. i am using mac osx
2. how do i know WHAT FIREWALLS I HAVE?
3. 256 MB SDRAM
4. 5 GB available
5. wireless connection
6. ???
7. connecting from home
8. limewire pro
9. wi-fi internet provider
10. no
11. yes, test worked!
12. brick wall!! yes!