upload problems

[soulman00soul]

windows xp sp2
zone alarm pro
alo
netgear adsl modem DG834G v3
limewire pro

hi dont know if anyone can help. having a few problems uploading.
people try to browse my files and they open chat and tell me im blocking them which im not and others cant download from me at all. i know there is probably an answer in the forum somewhere but i have concerntration problems and cant read through evrything any help would be appreciated. i can download no problem at all but dont want to look like a leach. i share my files and upload speed is set at max any ideas...?