Slow Downloads

I recently installed a Linksys router on my computer downstairs and the one upstairs uses wireless so we share our dsl, And now on my computer upstairs, the downloads in limewire only get up to 1 kbps. I have tried disabling my firewalls and it still doesnt work.

The limewire connects to the network but when I download something it only get up to 1 - 3 kbps

Whats wrong?

ok, I hooked up the dsl without the router and I still get the slow downloads, and I only get slow downloads on limewire, so Im thinking its my service provider.
Anyone have any ideas on what I could do now?

Would you provide the following information.

Computer type and CPU
Operating system and sp (MAC,Win98)
HDD
RAM
Firewalls
LimeWire Version
Java Version
Router type and model no.
Modem type and model no.
Who is your ISP

Thank you

Alienware Pentium 4
WinXP Sp2
1 GB ram
Sygate firewall
4.8.1
1.4.2_06
Linksys model WRT54G
Im not sure what the modem is because my service provider gave it to me. all I see on it is cablelabs
Sioux Valley Wireless