Here are the answers to all the questions you wanted me to answer...I hope these help....

-My OS is Windows XP.
-I don't know how to find my firewalls...
-I have 256 mb ram
-12.5 GB of space left on my hard disk
-I have a dialup connection
-I'm not sure of my moden brand name and what not...
-I'm connecting from my home...however I can connect to limewire, i just can't get a connection between me and the other user in order to download the song.
-I have LimeWire 4.12.3 and Java 1.5.0_06
-My ISP is the university I go to..however I've never had this problem before
-I'm not sharing the connection with other computers or p2p sharing programs
-This is a new problem for me and I've had limewire for awhile now.
-I did that test at "http://www3.limewire.com:6346/" and it said "your test worked"

Sarabeth86