SG Broadband Community

i'm use windows 7 ultimate 32 bit;
i think although my modem can give download speed up to 3,1 Mbps but because i buy the lowest speed packet (up to 153 kbps)
i must set "Connection Speed slidebar" to 144 right?
cz i didn't see number 153 on "Connection Speed slidebar"

I have modem USB like this :
http://i.imgur.com/UHn7H.jpg
ISP say my modem can reach download speed up to 3,1 Mbps but i can get if i'm buy a golden member;
i just buy regular so i got 153 kbps;
how much speed i set in TCP Optimizer "Connection Speed" slidebar?
my modem's name not viewed in ...

I using modem USB like this
http://i.imgur.com/LuksI.jpg
my ISP say this modem can give download speed up to 3,1 Mbps but it given if im buy Golden member;
i just buy Regular so my speed just up uo 153 Kbps;
so how many number must i set in "Connection Speed slidebar"
153 Kbps or 3,1 Mbps?
and i ...