Gaming Slow PS3 Internet connection.

[C175R]

Hey guys.
Im having problem with my Slow internet connection.
whenever I download a demo or anything it just takes like hours. and when I play online sometime it lags or kicks me out.
I found this
http://boardsus.playstation.com/t5/PlaySta...sp/m-p/37209641
on the ps3 forum but I got stuck on the part when I have to allow the privoxy on the firewall. I think I did it the way it suppose to be but the PS3 didnt connect it.
also it could be because I have ATT and not comcast.
is there any way to make your PS3 connection faster?

PS. yes. I know I could go post on the PS forum where I found that. but I like the ppl in here.