Please Help

Hi I was reading everything about how to improve the speeds and those proxy things
and i tried all the proxies they didnt even work I couldnt even connect at all
I have a 256K download and 128K Upload internet
My ISP blocks p2p in day time and at night time i get good speed from 1am to 6am
I dont have firewall
I have a router and i done the portforwarding
I have Windows XP PS2 Firewall disable
No Virus
No SPYWARE
Limewire 4.8.1 Pro
I get speed at day time 5kb/s max and at night time from 1am to 6am 30kb/s max
can anyone please help me with those proxies?