You understand that a 1.5mbps connection line will only let you download at about 150kb/s right? 1.5 mega bits, or 1536 kbps, 8 bits per byte would make it 192kb/s plus packet headers and such would put you around 150-160kb/s as the max for your connection.
I have a 6mbps line, and my max is about 760kb/s, and MrX has a 7mbps line apparently (from looking at his ISP's website, thats what it looks like)