Speeds of downlds depend upon your sources; ie: the people you're downlding from. See the following link & follow all the off-shoot links to find hints & extra skills to help solve your problem: To continue files downlding (click on link)

You have the same isp speed as I do; 256 kbps. Don't get confused between kbps & KB/s.
kbps = kilo bits per second
KB/s = Kilo Bytes per second
8 bits = 1 byte

I generally get 27 KB/s maximum speed from LW (including all downlds combined.) That's after overheads are subtracted (yes you lose between 13 to 20% of ISP advertised speed due to various things such as distance from phone exchange, loss due to modem itself, etc.)